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I have gathered everything since 2021 into one article, in Japanese and English. If you are new here, please start with this one.
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Update (November 2026): This article was written in April 2026. My application to suspend enforcement has since been rejected by Namerikawa City, and Miyazaki City has sent me a notice of seizure. Where this article says âunder deliberation,â it describes the situation as of April. The follow-up is linked below.
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To my close friends,
There's something I want you to know about why I've been away from my art.
I run an export business, and my consumption tax should have been exempt. Despite this, I had paid approximately 5 million yen in consumption tax that I did not owe.
In 2021, I requested a refund from the tax office. They refused. Instead, they reclassified me under non-taxable filing status until 2024. Then in 2024, a tax audit revealed that my right to a refund had expired under the statute of limitations â and I was ordered to repay the taxes from the non-taxable period.
In other words, they refused to return what they owed me, ran out the clock, and then billed me on top of it.
I continue to make faithful monthly repayments. Yet every month, I am subjected to calls in which I'm interrogated about personal matters completely unrelated to taxation, met with threatening language, and served with notices of asset seizure. This is not how you treat someone who is repaying in good faith.
I have filed a human rights complaint with the Legal Affairs Bureau regarding this treatment.
For the past several years, dealing with this unjust situation has consumed much of my time and energy, keeping me away from my art. My desire to return hasn't changed.
I'm truly grateful to all of you for your continued support. I'm sorry this is the kind of update I have to share.
As I'm focused on my work, I don't have much time to check social media. If you'd like to reach me, please email me at masakihirokawa@gmail.com â I'll respond promptly.
I will be back.
Four Years with Japan's Tax Office, and the Record I Kept with AI â A Complete Account of Unfair Taxation, AdMob Export Exemption, and Practical AI Guides
Masaki Hirokawa
Contemporary Artist · Indie App Developer · Founder of Dolice Labs
Prologue â Why I Decided to Bring This Together in One Place
One night in April 2026, I sat in front of the Ministry of Justice's online human rights consultation form and could not move for a long while. Writing it would mean putting into words everything that had happened over the past several years â a weight I had been carrying quietly for so long.
The one who stayed with me through that conversation was Claude, an AI built by Anthropic. As someone who is not a lawyer, drafting a statement that organizes facts cleanly, stays away from raw emotion, yet still says what needs to be said is not a simple task. Claude did not rush me. It received my feelings first, and then we built the document line by line, together.
Over the past several years, I have written twenty-one separate pieces on note.com about my long dispute with Japan's tax authorities, about the AdMob export exemption that lies at the centre of it, and about the way I have come to record my life with AI standing quietly beside me. Read separately, those pieces each have their own purpose. Read together, they begin to repeat â the same five-year timeline, the same numbers, the same author bio appearing again and again.
I wanted to bring them into a single long-form record. One narrative arc, with the bio and the headline numbers stated once near the start, and the unique stories, legal arguments, code examples, and practical guides preserved in full. This is that record.
I am writing for two kinds of reader. The first is the indie developer, the freelancer, or the artist who is right now caught in a similar standoff with a tax office and does not know where to raise their voice. The second is anyone outside Japan who would like to understand, calmly and concretely, what one taxpayer's life can look like when an administrative interpretation is allowed to move in a particular direction unopposed.
There are two things I most want to leave behind in this piece.
One is the existence of a legal mechanism called suspension of delinquency disposition (æ»çŽåŠåã®åæ¢). Most taxpayers in distress have never been told it exists; I had not, until I walked into the local Minsho office.
The other is that AI can become a quiet, trustworthy companion at the most fragile moments of a life. Not a substitute for a lawyer or a tax accountant. Something more modest, and more useful: a presence that helps you arrange what is already in your head into a form professionals can actually act on.
If even one reader, somewhere, takes a slightly different path tomorrow because these notes existed, this record will have done its work.
Chapter 1 â What Happened (Five-Year Timeline)
A short note on the person writing this
Let me set down who I am, once, near the start, so that I do not have to repeat it later.
My name is Masaki Hirokawa (廣巿¿æš¹). I work along two lines that have run in parallel for most of my adult life.
On the technology side, after several years as a systems engineer at NTT Data, I went independent in 2013 and began publishing iOS and Android apps the following year â wallpaper apps, calming apps, affirmation apps, ukiyo-e apps. Cumulative downloads have crossed 50 million; monthly active users have, at peak, exceeded 3 million. The vast majority of my revenue came from AdMob, peaking at roughly 1.5 million yen per month around 2018.
On the art side, I am a contemporary artist. To date I have received 17 international art awards, including a world rank of 14 on A' Design Award DAC (Italy, 2025â2026), the Meritorious Service to the Arts Award from the Luxembourg International Art Prize, and an Award of Achievement from the Greek Honorary Cultural Consulate. I have exhibited in more than 30 international shows, including the LA Art Show in Los Angeles, the Rome International Art Fair, the Paris International Contemporary Art Fair, and the Ansan International Photo Festival in Korea.
Living between "apps for income, art for meaning" was never glamorous. It suited me. I quietly wanted to leave something that one day I could hand to my four children. That was the daily shape of things â until the spring of 2022, when the conversation with the tax authorities began to turn.
The five-year timeline, in one column
2013â Started publishing iOS/Android apps. AdMob revenue began arriving from Google, paid from overseas, which should have made it export-exempt. Without realizing this, I paid consumption tax on it every year
~2018 AdMob revenue peaked at roughly 1.5 million JPY per month
2019 Decided to resume visual art seriously after a personal turning point in Tokyo
2020 By this point, cumulative overpaid consumption tax was roughly 5 million JPY (I had not yet realized this)
2021 Realized the overpayment. Asked Miyazaki Tax Office for a refund. Refund refused; offered "non-taxable handling through 2024" in its place
November 2021 Diagnosed with adjustment disorder, depression and insomnia
2022 Case transferred from Miyazaki Tax Office to Uozu Tax Office (Toyama Regional Taxation Bureau jurisdiction)
2024 Audit by Uozu and Toyama Tax Offices. Told my refund-claim right had expired by statute of limitations, and billed retroactively for the years previously treated as non-taxable
2024 My gastric ulcer and reflux esophagitis worsened
2024â Monthly repayments began, exceeding my monthly income
2025 Personal bankruptcy. Divorced; began living apart from four children. Art practice effectively suspended
February 2026 Consulted Minsho and learned about suspension of delinquency disposition
March 2026 Filed an online human rights complaint with the Legal Affairs Bureau
April 8, 2026 Filed applications for suspension to four authorities (Namerikawa City, Uozu Tax Office, Nyuzen Town, Miyazaki City)
April 15, 2026 On a call with Toyama Tax Office, I mentioned I was recording; the officer said he could say nothing and ended the call
April 16, 2026 Mid-phone-call with Toyama Tax Office, my condition collapsed; taken to hospital by ambulance
April 20, 2026 First in-person consultation with a lawyer
November 2026 Namerikawa City told me my application was rejected. Miyazaki City sent me a notice of seizure
In short: money that should have been refunded was withheld, no request for correction was allowed, the clock was allowed to run until the statute of limitations expired, and only then was an audit carried out â to bill me in the opposite direction. Even writing it down now, it still feels surreal that this happened to me.
The numbers behind my daily life
These are the figures of where I stand right now, stated once, plainly.
Consumption tax overpaid in the past (should have been out of scope): approximately 5,000,000 yen
Current outstanding tax balance: approximately 4,570,000 yen
Uozu Tax Office: about 1,700,000 yen
Miyazaki City: about 720,000 yen
Nyuzen Town: about 810,000 yen
Family-related taxes: about 1,340,000 yen
Declared annual income, fiscal year Reiwa 7: 537,169 yen
Monthly income equivalent: approximately 45,000 yen (about 290 USD)
Monthly tax repayment: approximately 60,668 yen (about 400 USD)
Repayment exceeding income: over 15,000 yen per month, roughly 135% of monthly income
Each month, my tax repayment exceeds my income. Almost nothing is left for living expenses. My art practice has been fully on hold for the last five years.
I am not lining up these numbers as a complaint of injury. I am writing them down because, on certain days, I cannot quite hold what has happened unless I see it in a single column. The gap between the scale of the business behind me (50 million downloads, 17 international awards) and the fragility of my present position is, even to me, hard to believe.
Where each authority sits in this story
Through the four years, I have been in contact with several different authorities. The conduct has not been uniform. Some treated me as someone to be intimidated; others took the time to understand. The same job title, public official, can carry profoundly different conduct.
Authorities whose treatment I have found problematic:
Miyazaki Tax Office â the office that originally refused my refund and offered "non-taxable handling" in its place
Miyazaki City Hall Tax Division â repeated questions about the details of my divorce
Toyama Tax Office â inappropriate questions about my private life; intimidating tone; online audits with cameras off
Uozu Tax Office â invasive personal questions; threatening attitude; delivery of seizure notices; demeanour shift on mention of recording
Authorities that treated me with respect and care:
Namerikawa City Hall Tax Division â listened thoughtfully; case currently under deliberation; suspension of delinquency disposition seriously considered
Nyuzen Town Hall â took the time to understand my situation; treated me with consistent humanity
These two authorities, more than anything else, are what bring into relief how unusual the treatment elsewhere has been. The problem, I have come to feel, is not the institution itself. It is the posture of the individuals operating within it â and the gaps in training and oversight that allow that posture to function unchecked.
The detail of how each office actually behaved during these four years is something I will set out carefully in Chapter 3.
Chapter 2 â My Story (As a Person)
I want to spend a chapter on the human shape of these four years before going into the legal and operational detail. Not because the technical details are unimportant â they are at the core of why this happened â but because the story does not make full sense without the person inside it.
The twin pillars
For most of my adult life I have run on two pillars: apps for income, art for meaning.
The technology pillar began in 1997, when I was sixteen. I sat in front of a noisy dial-up modem and discovered that I could reach people across borders simply by writing. I taught myself programming in the months that followed, and that early feeling â that technology, at its best, is a language that lets isolated people meet â has shaped every working day since. After several years at NTT Data, I went independent in 2013. In 2014 I began shipping iOS and Android apps, and over the next several years they accumulated more than 50 million downloads. AdMob revenue carried the household. At one point, more than three million people were using my apps every month.
The art pillar runs deeper, into a place I have always found harder to talk about. Both of my grandfathers â on my mother's and my father's side â were miyadaiku, the traditional carpenters who build shrines and temples in Japan. As a child I watched them work and absorbed, without being able to put it into words, the conviction that to move your hands carefully is itself a kind of devotion. When I was seventeen, an older artist I met online told me something I have never let go of: that art is a natural language open to every person, not a privilege of the few. Those two influences have sat quietly at the bottom of everything I have done since.
In April 2019, I was walking out of Kichijoji Station in Tokyo when something happened that I still find difficult to describe. A ring of light appeared above the station roof. It was the kind of moment in which a quiet certainty arrives, all at once, without explanation: that visual expression was something I needed to take up again, seriously. From that day onward, the art pillar â which had run beneath my technical work as a private background â began to come forward. The international awards began to accumulate. By 2025â2026, I had been selected as Top 14 worldwide on the A' Design Award DAC.
I do not list these things to impress. I list them because the gap between that background and the present situation â a person of that profile, paying 60,668 yen a month out of a 45,000 yen monthly income while being repeatedly questioned about his divorce â is the part of this story I keep returning to without quite believing.
What four years did to my body
Since November 2021, the tax situation has weighed heavily on both body and mind. Living with it, I have accumulated the following diagnoses, all still under treatment:
Adjustment disorder
Depression
Insomnia
Gastric ulcer
Gastroesophageal reflux disease
On April 16, 2026, mid-phone-call with an officer of Toyama Tax Office, my condition collapsed and I was taken to hospital by ambulance. Chest palpitations, severe stomach pain, nausea I could not stop. At the hospital I was given a sedative and an intramuscular injection. The doctor told me to put distance between myself and the source of stress. The tax office continued calling the next day, and the day after that. Four days after the hospital, I walked into a law firm for my first consultation.
For more than five years, the rhythm of my art practice â the rhythm that had earned 17 international awards â has effectively stopped. What it means that a creative practice has been paused for that long, I am still not able to look at fully. There is a quiet grief in feeling that an artistic career was halted by the conduct of administrative bodies, not by a lack of will to create.
The family I now live apart from
In 2025, my marriage ended. I now live apart from my four children.
The financial situation that led to that ending was directly downstream from the tax dispute. After the 2024 audit and the back-tax assessment, the debt consolidation refinancing I had been arranging stopped clearing. Application after application was rejected. The non-taxable treatment that Miyazaki Tax Office had once accepted, and the back-tax demand that Toyama had now issued, were appearing in credit reviews as contradictory facts about the same person. The interest on existing high-rate debt kept growing. Caught between the two, in 2025 I filed for personal bankruptcy. The marriage did not survive what followed.
If Miyazaki Tax Office had simply refunded the overpaid consumption tax correctly back in 2021 â the legitimate remedy that any taxpayer has the right to request â I could have continued with normal filings, the consolidation loan would have been approved, the runaway interest could have been stopped, and the financial situation would never have deteriorated this far. I am not asserting malice. I am noting that one administrative interpretation, allowed to move in a particular direction, can dismantle the entire base of a household.
I am not going to try to put a monetary figure on what was lost. The fact that I could not be present as a father during the most formative years of my children's lives â the morning routines, the dinners, the small weekend memories, the school events â none of that can be returned by any judgment or settlement. What I am writing here is not a demand for revenge, and not a demand for compensation. It is a quiet hope: that one day, when I can speak with my chest open, my four children will understand that their father did not stand against this season alone.
To entrust warmth and strength to the next generation feels, more and more, like the role given to me. That belief is the one thing in this period I have not let go of.
Why I keep writing at all
There must be many other self-employed people across Japan in similar positions â pressed into corners by unjust taxation, intrusive contact, and a structure that makes speaking up difficult. The reason I keep writing, even on the days writing itself is hard, is that the worst of administrative bad faith functions most strongly in places where light does not reach. So light has to be brought, however small the source.
In 1997, at sixteen, I taught myself programming and felt for the first time what it meant to connect with people across borders. Working with Claude today, organizing documents one at a time until the small hours, I sense that the work belongs to the same lineage â a quiet thread that runs from a teenage night with a dial-up modem to a forty-something man at a desk in Toyama, putting one careful sentence after another so that the next person will not have to start from nothing.
Chapter 3 â Toyama and Uozu (How Each Office Responded)
This chapter is the careful, plain-language record of how each office actually behaved through the four years. I keep coming back to one observation: the same job title can carry profoundly different conduct. Some officials treated me as a person; some did not. I am setting both kinds out, side by side, because both are part of what happened.
Miyazaki Tax Office â the original refusal
In 2021, I formally asked Miyazaki Tax Office to refund the overpaid consumption tax. They refused.
More than that â they did not even let me file a proper request for correction (æŽæ£ã®è«æ±), which is the legitimate legal procedure for recovering an overpayment. The desk-level response felt polite, but functionally the refund window was closed. What they offered in place of a refund was, in effect: "From now on, we will treat your filings as non-taxable through 2024."
On the surface it looked like a concession. In practical effect, it was a way to buy time â the kind of time during which a refund-claim window quietly runs out. At the time, I accepted the arrangement in good faith. I thought it meant the matter would be handled quietly while I kept my business running. I now believe that a taxpayer's legitimate right to file a request for correction was, in practice, obstructed at that desk.
Miyazaki City Hall Tax Division â the questions that did not belong
At the Miyazaki City Hall Tax Division, the pattern of recurring questions about my divorce and other matters of private life began. There is no legal basis for tax collection work to probe into the details of a person's marriage. Article 74 of the General Act of National Taxes defines the right of inquiry, but its scope is strictly limited to "questions necessary to determine the tax base and tax amount." The details of a divorce do not fall within that scope by any honest reading.
These questions were repeated, persistently, over many calls. The texture of this was very similar to what I later experienced with Toyama and Uozu. When the same pattern recurs across multiple authorities, it begins to look less like an individual error and more like a structural matter on the side of operations and training.
Toyama Tax Office â online audits with the camera off
In 2022, my case was transferred from Miyazaki Tax Office to Uozu Tax Office (Toyama Regional Taxation Bureau jurisdiction). A portion of the subsequent audit was conducted online by Toyama Tax Office.
Throughout that audit, the tax officer kept their camera off. Only I, the taxpayer, was visible; the other party remained effectively anonymous while continuing to question me. The one-way nature of that setup left a strong feeling I have not been able to shake.
Many of the questions in that audit had no connection to my tax liability at all: the circumstances of my divorce, my relationship with my former spouse, my children, even my current romantic life. These are not factors in a consumption-tax determination. They are purely matters of private life. Article 13 of the Constitution of Japan provides for individual dignity and privacy, and Article 35 for protection against unreasonable search and seizure. When an audit operates outside that frame, the practical question of what can happen inside that vacuum is one this experience put squarely in front of me.
After the audit, Toyama Tax Office called me almost every month. Even though I was repaying faithfully â more than my income â the calls continued. Threatening language was used on several occasions. Seizure notices were delivered.
Uozu Tax Office â the moment recording was mentioned
The officer at Uozu Tax Office whose conduct I have written about most carefully left me deeply troubled by how our conversations were handled.
When I first called the office, I had to ask several times before I could even understand his name properly. Identifying one's affiliation and full name is the most basic courtesy of public service, and it took repeated prompting before I had it clearly. He did not show his face when an in-person meeting was requested. To virtually every substantive question I asked, the answer was either silence or "I cannot answer that."
I explained the background, carefully and patiently. AdMob ad revenue is paid by a non-resident overseas entity (Google Ireland Ltd. or Google Asia Pacific Pte. Ltd.). Under Article 7 of the Consumption Tax Act and Article 17 of its Enforcement Order, this is a service provided to a non-resident and outside the scope of Japanese consumption tax. I had overpaid approximately 5,000,000 yen on that basis. In 2021 I had filed a correction claim, and it had been rejected. In 2024 I had been suddenly billed retroactively on the grounds that the statute of limitations had passed.
After explaining all of this, I asked quietly:
"If you were to put yourself in my position, could you understand the situation?"
The officer's answer was: "I cannot understand."
I lost my words for a moment. For five years I had been suffering from adjustment disorder, depression, and chronic insomnia. The career of an artist with 17 international awards had been on hold for the entire time. I had walked him through all of it. The reply was still I cannot understand.
Then, when I let him know that I was recording the call so I could later review the conversation accurately, the officer simply said, "I cannot speak any further," and ended the call. A few days later, I called again. His response was: "In light of the danger of being recorded, I cannot answer anything."
The word danger stayed with me for a long time. When a citizen records a public servant performing their official duties, and that recording is described as a "danger," is the speaker not, in effect, admitting that there is something they would prefer not to have on the record? If the conduct were appropriate, being recorded should pose no problem. They should, if anything, welcome having an accurate record. That was how I came to read those words.
This pattern recurred. Conversations would continue politely until I mentioned that I was recording, and then the tone would shift within seconds and the call would end. I find it hard to read that pattern as anything other than discomfort at the prospect of one's own words being preserved.
Work commissioned by Toyama, and the response from the tax side
Toyama's administration was not, in fact, my first encounter with the city.
In 2011, after the Great East Japan Earthquake, the country was wrapped in a long period of grief and voluntary restraint. During that period, the mayor of Toyama City asked me to build a promotional website for Toyama, funded by significant public money. I was genuinely grateful at the time that my technical skills and track record had been valued. In 2024, after the Noto Peninsula earthquake, the City of Toyama again commissioned me to build websites as part of the recovery effort, again using public funds. The right hand of the administration recognized the value of my work and wrote me a public contract.
Meanwhile, the left hand â the tax division of the same prefectural sphere â was sending me seizure notices and probing into the details of my divorce. It felt to me as though my skills were welcomed when they were useful, while my situation was overlooked when it was not. And when problems arise, say "I cannot understand." It is hard not to feel a quiet disappointment when an administration so visibly does not know what its own hands are doing.
Uozu Tax Office â the same refusal, in person
In April 2026, after several months of phone calls had gone nowhere, I visited Uozu Tax Office in person. I asked to meet the officer in charge. He did not come out to face me. In the end the exchange took place through the counter window.
I explained, once more and as carefully as I could:
AdMob ad revenue is paid by Google Ireland and constitutes a service provided to a foreign business entity
Under Article 7 of the Consumption Tax Act and Article 17 of its Enforcement Order, this is outside the scope of Japanese consumption tax
I had overpaid approximately 5,000,000 yen in the past
I am currently being asked to repay about 60,668 yen per month against a monthly income of about 45,000 yen, which is mathematically impossible
The officer's response was a repetition of the office's existing position. He did not address the substance of the unfair taxation, and there was no mention of any possibility of a refund.
When I told him, "I will be keeping a record of this exchange," his demeanour shifted in an instant. "I cannot speak with you any further." With that one sentence, the conversation was over.
At that moment, in my view, Uozu Tax Office stepped from a position where it might still have corrected an unfair situation into a position where it was, as an organisation, defending it.
The night of April 15, and the morning after
On April 15, 2026, I had spoken with an officer of Toyama Tax Office on the phone. I had told him in advance: "I would like to record this conversation so that I can review it accurately later." His response was: "If you are going to record, I cannot speak." Refusing dialogue itself on the grounds of recording is, in practice, a way of obstructing a taxpayer's legitimate rights. I had â and still have â perfectly legitimate reasons to record: to protect my own rights and my health, and to be able to review what was said later, the way any cautious person would.
The day after that call, on April 16, my gastric ulcer flared up. Severe stomach pain and nausea continued through the day. I could not keep food or water down, and I could not sleep. Late that night, the symptoms worsened to the point where I could no longer make it to a hospital on my own, and I called an ambulance.
At the hospital I received an as-needed sedative and an intramuscular injection. The doctor told me to put distance between myself and the source of stress. The phone calls did not stop. They continued through the next day, and the day after.
Another officer at Toyama, and the suspension-of-delinquency petition
I have also been in contact with another officer at Toyama Tax Office in connection with the suspension-of-delinquency-disposition petition I filed through Minsho. His response to the petition has, so far, been carefully formal but not substantively engaged. The office has neither rejected the application outright nor moved it forward. The same demand for monthly repayment, more than my income, has continued in parallel.
Namerikawa City Hall and Nyuzen Town Hall â the side that carried me
I want to be careful, though, to leave the following on the record clearly: not every authority I dealt with treated me this way.
Namerikawa City Hall Tax Division and Nyuzen Town Hall have listened to my situation with care and respect throughout. Both authorities currently consider my case "under deliberation," and I have been told that suspension of delinquency disposition is being seriously considered.
That single phrase â under deliberation â carried more weight for me than I had expected. When an administrative body says it, the matter has not been dismissed outright; an internal review process is actually underway. That is a very different stance from the "I cannot understand" kind of shutdown.
Local municipalities â the level of government closest to residents â were willing to engage. Perhaps that is because, being closest to the people they serve, local officers find it harder to look away. Because of these two authorities, I have learned that within the very same tax administration, treatment can differ profoundly. Their conscientiousness, more than anything else, is what brings into relief how unusual the treatment elsewhere has been.
I do not see administration as a whole as my opponent. There are sincere officers, and I have met some of them. The problem is that, in certain parts of the structure, sincerity has stopped functioning.
Chapter 4 â Legal Arguments and the Suspension of Delinquency Disposition
This chapter is the legal spine of the record. I am not a lawyer; final legal judgment belongs with my counsel. What follows is what Claude and I worked through together over many weeks of late-night sessions, and what was then refined in consultation with Minshoren and the law firm I retained in April 2026.
I am setting it out here in some detail because most of these arguments and mechanisms â particularly suspension of delinquency disposition â are not surfaced at tax-office counters. They have to be sought out. If a reader recognizes their own situation, my hope is that some of these threads become starting points for their own preparation.
1. Violation of the principle of good faith (estoppel)
In 2021, Miyazaki Tax Office refused my refund claim and offered "non-taxable treatment through 2024" in its place. I acted in reliance on that proposal. In 2024, the tax for those same years was then billed back to me, while the original refund window was declared time-barred.
This sequence raises a serious question under Article 1, Paragraph 2 of Japan's Civil Code â the principle of good faith and sincerity (ä¿¡çŸ©èª å®ã®åå). For an administrative body to reverse a position it previously stated, in a way that harms a taxpayer who relied on it, runs counter to the principle of protection of trust that runs through Japanese administrative law.
Several advisors I have consulted have described this as a serious estoppel question. Final legal evaluation will be a matter for the attorneys now coming into my case. From my vantage point, what I can write down honestly is that I have not been able to receive this sequence as "just procedure."
2. The State Redress Act
Article 1 of the State Redress Act provides that when a public official, in the course of their duties, causes harm to another person unlawfully through intent or negligence, the state bears responsibility to compensate the harm.
The threads under consideration in my case include intimidating conduct, privacy violations, the de facto obstruction of a request for correction, the continuation of business-disrupting contact after an emergency hospitalization, and the causal link between sustained pressure and documented health damage. Whether any of these meet the threshold for a successful claim is for counsel to assess.
3. The right of privacy and personality rights
Article 13 of the Constitution of Japan guarantees individual dignity and the right to pursue happiness. Article 35 forbids unjust intrusion and search. The authority to conduct tax audits derives from Article 74 of the General Act of National Taxes, but its scope is strictly limited to "questions necessary to determine the tax base and tax amount." The details of a divorce, of a romantic relationship, of family composition â these clearly fall outside that scope.
Taxpayers have an obligation to file and pay in good faith. I am fulfilling that obligation; I am repaying more than I earn each month. But the personality rights, the privacy, and the basic human dignity of taxpayers also deserve to be respected. That is the position I am holding to.
4. Suspension of delinquency disposition â the relief no one tells you about
Of everything in this chapter, this is the single piece I most want a fellow taxpayer in distress to know exists.
Under Article 153 of the National Tax Collection Act (for national taxes) and Article 15-7 of the Local Tax Act (for local taxes), a taxpayer can formally apply for suspension of delinquency disposition (æ»çŽåŠåã®åæ¢).
The mechanism may apply when:
A delinquency disposition would put the person's life into severe distress.
The person has no seizable property.
If the suspension continues for three years, the tax obligation itself is extinguished.
My current state clearly fits these conditions. My tax repayment already exceeds my income, by more than 15,000 yen a month.
The most frightening part of this whole experience has been simply that I did not know this existed. Front-desk staff at tax offices do not bring it up. I only learned about it after consulting Minshoren â the Democratic Commerce and Industry Association.
I imagine that across Japan, many self-employed people are quietly accepting an enforcement procedure that, if formally challenged, could be suspended outright. People in trouble are easiest to corner when they do not know there is a place to raise their voice.
If you are reading this from inside a similar situation: please at least let the phrase suspension of delinquency disposition (æ»çŽåŠåã®åæ¢) and the name Minsho sit somewhere in the back of your mind. Just those two pieces of knowledge may change the shape of what comes next.
5. The unlawfulness of seizure given an income-exceeding repayment
A delinquency disposition (seizure) cannot be enforced when it would put the delinquent's life into severe distress (Article 153 of the National Tax Collection Act, again). To require a monthly repayment of 60,668 yen against a monthly income of 45,000 yen, and to additionally deliver a seizure notice, is in my reading a clear contradiction of this provision. The numbers do not balance, and they have not balanced for a long time.
6. The role of Minshoren (Minsho)
Many people think, "If you are in trouble with the tax office, just consult a tax accountant." I thought so too. Over time, I came to understand that in reality, tax accountants and tax offices are very close.
It is common for former tax office employees to leave and establish themselves as tax accountants. They maintain relationships with their former colleagues. Whether tax accountants then genuinely operate as advocates for taxpayers â pushing back firmly against the tax office at real personal cost â is, honestly, a question I now hold open. When I consulted a tax accountant, I did not feel a strong willingness to advocate for the taxpayer's rights against the tax office.
That is why an organization like Minshoren â the Democratic Commerce and Industry Association (æ°äž»åå·¥äŒ, abbreviated Minsho) â which supports taxpayers from an independent position outside the tax office's sphere, carries renewed importance for me. It is at the Minsho office that I first learned about suspension of delinquency disposition. They walked me through what mechanisms were applicable to my case, helped me organize the materials, and stood beside me through the early consultations.
7. The structure of the petition
Through Minsho, I filed formal applications for suspension of delinquency disposition addressed to four authorities:
Namerikawa City Hall Tax Division
Uozu Tax Office
Nyuzen Town Hall Tax Division
Miyazaki City Hall Tax Division
Each petition follows roughly the same structure:
Petitioner information
Outline of the case (in chronological form)
The applicable statutory provisions (Article 153 of the National Tax Collection Act or Article 15-7 of the Local Tax Act)
Concrete demonstration of severe life distress (monthly income, monthly repayment, the gap between them, health condition)
Demonstration of the absence of seizable property
Request for suspension and, after three years, extinguishment of the tax obligation
Attachments: tax filings, medical certificates, bankruptcy documents, evidence of conduct by each authority
Claude helped me draft each version of these petitions, look up the correct addresses of each authority, and refine the wording so the legal arguments came through cleanly without raw emotion. The final review and the actual filing remained mine.
8. Where to turn
For self-employed people in a similar situation, here are the places I would suggest considering. They are not in any rigid order; what fits depends on the texture of your case.
Minshoren (Minsho â Democratic Commerce and Industry Association): A taxpayer-side organization specialized in tax and management consultation for self-employed people. There is a branch in every prefecture.
Legal Affairs Bureau â online human rights consultation: For human rights concerns regarding intimidating conduct or invasive treatment by public officials.
Houterasu (Japan Legal Support Center): Free legal consultation for those in financial difficulty, and possible advance of attorney's retainer if you meet the income criteria. (0570-078374)
Free consultations through the regional Tax Accountants Association: Held periodically; useful for an independent second opinion on classification questions.
Your local Chamber of Commerce and Industry: Less specialized than the others, but a useful entry point for small-business owners.
The lawyer consultation in April 2026 was funded through the Houterasu framework, after Minsho had helped me prepare the materials. The whole pipeline â Minsho â Houterasu â law firm â suspension-of-delinquency petitions â human rights complaint â is one path among several, but it is the one I walked, and it is workable.
Chapter 5 â The Reality of AdMob Export Exemption (As an App Developer)
This chapter is the technical centre of the story. Everything else in this record â the refund refusal, the statute of limitations, the back-tax assessment, the household collapse â branches out from a single technical question: how is AdMob revenue treated under Japan's Consumption Tax Act?
I am writing this chapter especially for indie developers who earn revenue through overseas platforms â AdMob, Google Play, the App Store, Stripe, Patreon, Unity Ads, AppLovin, overseas SaaS subscriptions. If your business looks like mine, please read this section carefully and confirm your own classification with a tax professional. The five million yen I overpaid did not need to be paid.
Article 7 of the Consumption Tax Act, in plain language
Japan's Consumption Tax Act treats exports as non-taxable. The mechanism is known as the export exemption (茞åºå çš). It is set out in Article 7 of the Consumption Tax Act and elaborated in Article 17 of its Enforcement Order ("export-like transactions").
For physical goods, the application is intuitive: if you ship something abroad, it is not subject to domestic consumption tax. For digital services, the application is less intuitive but the principle is the same: when the service is provided to a non-resident overseas, the transaction may fall within the export exemption.
The key word is non-resident. The Consumption Tax Act treats services provided to foreign companies as services provided "to a place outside Japan," and therefore as export-like â out of scope for Japanese consumption tax.
How AdMob revenue is classified
AdMob payments to a Japan-resident developer typically come from one of two Google entities:
Google Asia Pacific Pte. Ltd. (Singapore)
Google Ireland Ltd. (Ireland)
Both are non-resident foreign business entities. Providing in-app ad inventory to either is, in substance, providing a service to a foreign company. Under Article 7 of the Consumption Tax Act and Article 17 of the Enforcement Order, this kind of revenue is generally treated not as taxable sales but as export-exempt (out-of-scope) sales.
In 2015 Japan introduced a reverse-charge mechanism for certain cross-border digital services, which sits beside the export exemption and is sometimes confused with it. The line is worth understanding clearly. Claude is good at walking through where each regime applies given the specifics of the transaction; I will set out the prompt patterns shortly.
App Store, Google Play, and Stripe â the same logic
The same analysis applies, with caveats, to other major overseas platforms:
Apple App Store: Payments come from Apple Distribution International Ltd. (Ireland). Service provided to a non-resident â export-exempt (out of scope).
Google Play: Payments come from Google Asia Pacific Pte. Ltd. (Singapore). Service provided to a non-resident â export-exempt (out of scope).
Stripe: For payments from a foreign-incorporated Stripe entity (e.g., Stripe, Inc. in the U.S.), the same analysis applies. For payments routed through Stripe Japan, the analysis can differ; you should confirm by checking the actual remittance entity on your statements.
Patreon, overseas SaaS subscriptions: Same principle â check the actual paying entity.
In contrast:
Domestic Japanese clients: Domestic transactions â taxable.
Overseas clients (direct contracts, not platform-mediated): Service provided to a non-resident â export-exempt.
When you ask Claude or Gemini to classify a transaction, the key facts to surface are: who is the actual paying entity (country of incorporation), what currency is used, where the payment is remitted from, and what the underlying service is. The classification follows from those facts.
What the export exemption actually means for your books
For sole proprietors with significant input-tax-bearing expenses â servers, development tools, hardware, advertising â applying the export exemption correctly can produce a meaningful refund of consumption tax on those expenses, because the input tax credit is calculated against the portion corresponding to exempt sales as if it were taxable.
In practice, many AdMob-focused developers are in a position to receive consumption tax refunds each year, not to pay consumption tax. For the first several years of my business, I did receive these refunds. Filed correctly, the refund mechanism is a lawful and intended feature of the law. Filed incorrectly, the same revenue can be classified as taxable and produce a consumption tax bill running into millions of yen.
The root cause of my five-million-yen overpayment
Until 2020, I did not understand the analysis above clearly enough. The tax accountant I was working with did not raise the export exemption proactively. Tax accountants well versed in digital advertising revenue were, in regional Japan back then, extremely rare. So for several years I quietly recorded AdMob revenue as taxable, and quietly paid consumption tax that did not need to be paid.
By 2020, the cumulative overpayment came to roughly five million yen. I only realized in 2021, after stumbling across an article about the export exemption while researching something else.
I want to be clear: part of the responsibility was mine. I should have learned this earlier. The other part lies with the structural gap between the tax field's familiarity with physical exports and its slow uptake of digital cross-border services. Many tax accountants still treat digital ad revenue simply as "domestic business income." Tax office staff often do the same. That gap in knowledge becomes the breeding ground for unfair taxation against the kind of developer who lives mostly inside that gap.
How to defend yourself using AI
If you ship apps and earn revenue through AdMob or similar platforms, here are the AI-assisted defenses I now use. I would urge you to put at least the first two in place from the beginning, not after a tax letter arrives.
A clean prompt for revenue classification
I am a Japan-resident sole proprietor with the following sources
of income. For each source, please determine its classification
under the Japanese Consumption Tax Act: taxable, non-taxable,
out of scope, or export-exempt.
[Income Sources]
1. Google AdMob ad revenue (paid by Google Ireland Ltd)
2. Google AdMob ad revenue (paid by Google Asia Pacific Pte. Ltd., SG)
3. Apple App Store revenue (paid by Apple Distribution International Ltd, IE)
4. Web development for a domestic Japanese company
5. Design work for an overseas company (US)
For each, cite the relevant articles of the Consumption Tax Act
and the Enforcement Order, and note any conditions or evidence
required to support the classification.The output you want includes the statutory basis for each item, the conditions of application, and the evidence required to support the classification at audit. Claude is reliable at producing this if you ask carefully.
A clean prompt for ledger re-classification
If you have several years of bookkeeping already in place and want to surface possible overpayments, export your ledger as a CSV and hand it to Claude:
This ledger contains my yearly transactions as a sole proprietor.
Based on the counterparty country, currency, and nature of the
service, re-classify each row in light of Article 7 of the
Consumption Tax Act (export exemption) and Article 17 of the
Enforcement Order. For each row, include the reasoning and any
additional evidence required to finalize the classification.It is not unusual for several years' worth of overpayment to come into view through this exercise. Once you find it, move quickly. The statutory window for a consumption tax correction is five years from the legal filing deadline. Every month you delay, an earlier year falls out of reach.
Distinguishing the three categories cleanly
Japanese consumption tax has roughly three categories that freelancers tend to confuse:
Please explain the differences between the following three
consumption tax categories with concrete examples. Please focus
especially on cases that freelancers and self-employed
individuals tend to misclassify.
1. Taxable transactions (kazei torihiki)
2. Non-taxable transactions (hi-kazei torihiki)
3. Out-of-scope transactions (fukazei torihiki, including export exemption)Where a generalist tax accountant might give a vague reply, AI follows the structure of the actual statute and makes the line of reasoning explicit. The difference between non-taxable, out-of-scope, and export-exempt affects the input tax credit calculation, sometimes by a large margin. If you have a similar revenue profile to mine, the distinction deserves your full attention.
The "handover" trap
A change of jurisdiction due to relocation is a routine procedure for a sole proprietor. But that "handover" can include, as one practical option, simply waiting out the statute of limitations on refund claims. I did not know this at the time. The handover from Miyazaki Tax Office to Uozu Tax Office in 2022 looked, to me, like a continuation of an in-progress refund procedure. In practice, it became something else.
If you ever receive a handover notice, get it reviewed by a tax advisor or a lawyer at that moment. Confirm in writing what is being handed over, the status of any outstanding refund claims, and the deadlines that remain. A short, written confirmation in that single moment may be enough to prevent a future collapse.
Three habits I would urge on any developer with overseas revenue
If your revenue comes from AdMob, Google Play, the App Store, Stripe, Patreon, or overseas SaaS subscriptions, please put these three habits in place from the very first day, not after the first audit letter.
Centralize revenue tracking. Maintain a single Google Sheet that aggregates monthly revenue from every app and every platform, by source. With this sheet, Claude or Gemini can quickly estimate the share of sales that may qualify as export-exempt.
Preserve every document chronologically. Scan letters from the tax office or financial institutions and store them in Google Drive with a consistent filename convention (`YYYY-MM-DD_type_short-description`). Years later, this archive may become the evidence that protects you. Chapter 6 sets out the full folder structure I now use.
Periodically ask AI to re-check your classification. Once a year, run the ledger re-classification prompt above against your bookkeeping. If anything surfaces, bring it to your tax advisor with the wording: "the AI suggests this â what is your view?" Opening the conversation this way dramatically raises its quality.
There is much that no longer fits in time for me. But for you, reading this, time may still be left. I hope that, from today, you can begin preparing so that the same mistake is not repeated.
Chapter 6 â Recordkeeping Practices Built with AI
A long battle is also a battle against your own memory. Across four years of correspondence, audits, hospital visits, and consultations, the fine detail of what was said by whom on which day quietly slips away unless you build a system to hold it for you.
This chapter is the operational record of how I came to delegate recordkeeping to AI â Claude Projects for the deep, narrative work, Antigravity for the recurring automations, and Gemini and Google Workspace for the daily archive. None of these tools wins a case for you. What they do is keep the foundation underneath you steady enough that you can keep functioning, even on the days when your hands cannot move.
The principle I held to from the beginning
One discipline runs through everything that follows: the agent handles records and organization; I handle claims and judgment.
Early on, I tried to delegate too much to AI. "Draft a reply email to the lawyer." "Suggest the next message to the tax office." I once tried to hand off even tasks at that level. The results were not good. In the fine details of a legal argument, there is a moment when you get carried along by the model's plausible-sounding text, and you only later notice it has drifted from what you actually intended. Decisions and conclusions stay with the human; the AI restricts itself to organization and drafting. Hold that line from day one to the last day.
Claude Projects â the deep workspace
For the lawyer consultation in April 2026, I set up a single Claude Project and gathered every document from the past several months into it. Into the project I uploaded:
All written notices from tax offices since 2022 (PDF)
Copies of my tax returns for the past five years
Annual AdMob revenue reports (in English)
Notices of rejected consolidation-loan applications
A copy of the bankruptcy filing
Medical certificates and prescriptions
Several PDF briefing documents I had already drafted
The system prompt I placed at the head of the project looked roughly like this:
You are a careful assistant familiar with Japanese tax and
administrative law. I am an independent business owner in
a long-running dispute with the tax office over whether my
revenue qualifies as export-exempt consumption tax.
Please respond according to these guidelines:
1. Distinguish clearly between fact and inference.
Use "is considered to be" and "is stipulated as" with care.
2. Prioritize organizing the facts and clarifying the points
in dispute over offering emotional empathy.
3. When citing statutes, name the act and the article/paragraph.
4. Assume the text will be used to explain matters to a lawyer.
Build the reasoning accordingly.
5. Assume that my health is poor. Avoid long single responses.
Organize information in stages.I revised this prompt several times over a few weeks. My early drafts asked the model to "encourage me warmly," because at the time I felt I needed warmth. After about two weeks, I understood that what I actually needed was structure. Warmth from a model is a slight comfort; structure from a model is what lets you keep functioning. I now want my AI cold, accurate, and patient.
With the project in place, I could ask things like:
"For Chapter 8 of the lawyer briefing, write 500 to 800 characters about the loss of family and the separation from my four children. Keep the dignity intact. Make clear that this is not a claim to recover what has been lost, but a record meant to protect the next person from the same suffering."
The draft that came back was usable with very little editing. The final pass was mine, always. But on days when I could only sit at my desk for a few hours, having a model that built the first seventy percent of the bone structure for me was, quite literally, a lifeline.
I also asked Claude to "list ten legal issues raised by this case, with rough priority, an estimated range for retainer fees, and any approaching statute-of-limitations dates." The list that came back is the same one I brought to the lawyer as a menu:
Export-exemption eligibility (Consumption Tax Act Art. 7, Enforcement Order Art. 17)
Violation of the principle of good faith and estoppel
The propriety of how the statute of limitations was applied
Amended-return request (General Act of National Taxes Art. 23)
Stay of collection proceedings (National Tax Collection Act Art. 153)
Damages under Article 1 of the State Redress Act
Due-process concerns regarding refusal to be recorded and to explain
Handling of personal information
Causal link between sustained business-disrupting contact and health damage
Pre-litigation negotiation and settlement options
Within the limits of his specialty and his time, the lawyer can decide where to begin.
Drive folder structure â the warehouse for the long battle
The single most useful structural decision I made was to organize my Google Drive top-level folder, `Tax_Dispute_2022_`, by event-based chronology rather than by document type. In a long battle, "what happened around the time of that event" is the search path the mind actually uses.
Tax_Dispute_2022_/
âââ 01_Miyazaki_Transfer_2022/
â âââ 2022-XX-XX_phone_memo.docx
â âââ 2022-XX-XX_official_letter.pdf
â âââ context_notes.docx
âââ 02_Uozu_Audit_2023/
âââ 03_Toyama_Reassessment_2024/
âââ 04_Bankruptcy_2025/
âââ 05_Divorce_2025/
âââ 06_Ongoing_Pressure_2026/
â âââ 2026-04-16_ER_admission/
â â âââ hospital_discharge_summary.pdf
â â âââ prescription_photo.jpg
â â âââ symptom_log.docx
â âââ 2026-04-17_followup_call_memo.docx
âââ 99_Reference/
âââ tax_statutes_excerpt.docx
âââ admob_revenue_2020_2025.xlsx
âââ past_filings/This structure is something you can hand to a lawyer exactly as-is. Whether you can offer "a bundle of evidence that follows a timeline" instead of "a pile of documents I don't know where to start with" determines the quality of the consultation more than I once realized.
The single most effective discipline was a unified filename pattern: `YYYY-MM-DD_type_short_description`.
`2026-04-16_memo_toyama_tax_office_call.docx`
`2026-04-16_medical_ER_prescription.pdf`
`2022-XX-XX_letter_miyazaki_transfer_notice.pdf` (use XX-XX when the date is unclear)
By putting the date at the front, you can type "2026-04" into Drive's search and instantly see every document tied to that month. On the days when my health was so bad I couldn't even recall the previous week's events, this saved me again and again.
Antigravity â the agents that kept running while I rested
Through four years of conflict, I tried to keep up call memos, document scanning, monthly status updates, consistency checks, and consultation PDF updates by hand. In good months, all of it ran. But after the 2024 assessment notice, the 2025 bankruptcy, the divorce, and the 2026 ER visit, each of these events stopped my hands for days or weeks at a time. Whenever the manual work broke off, I would start spending hours just remembering "what had I done, and how far?" â and in those hours my stomach would hurt again and my sleep would go again.
My personal answer to that fragility was agentic AI. Using Antigravity's agent capability, I built a state in which "even on days when my hands cannot move, the minimum of recording and organizing continues." Below is the agent team that quietly kept running on my behalf.
Agent 1 â Tax record organizer
The first agent watches a single inbox folder and reflects its contents into a ledger:
Role: tax record organizer
Input: new files under tax/inbox/ (PDF, image, text)
Actions:
1. OCR or structured-extract each new file
2. Pull date, counterparty, amount, currency,
country of invoice issuance
3. Append to tax/ledger/2025.csv
4. Tentatively classify consumption tax treatment per
Consumption Tax Act Article 7 and Enforcement Order Article 17
5. Add any unclear rows as bullets to tax/ledger/review.md
Stop condition: when inbox is empty, stop and present a summaryThe word tentatively matters. By fixing at the entrance the rule that final classification is the human's responsibility, you prevent the agent from over-reaching toward conclusions it has no business making.
Agent 2 â Correspondence logger
Calls and letters are queried later, always, as: who, when, in what document, said what? Memory alone, across four years, will produce contradictions that break your case. So:
Role: correspondence log editor
Input: new emails in Gmail label "tax-response", phone call notes
Actions:
1. Read new emails in date order
2. Append to tax/correspondence/2025.md in this format:
- datetime / counterparty / channel / their claim /
our claim / agreements / observations
3. Regenerate the chronological Markdown table in the same file
4. If something looks legally significant, write to tax/alerts.mdI gave this agent an alerts file so it would never miss the case where intimidating contact continues even after an emergency hospitalization. The agent never decides; it ensures nothing slips past unnoticed.
Agent 3 â Houterasu document drafter
The chronology report is a living document. Every new fact bumps the version.
Role: editor of the chronology report for Houterasu
Inputs:
- tax/ledger/2025.csv
- tax/correspondence/2025.md
- tax/facts/known-events.md
Output:
- tax/report/legal_complaint_report_v{N}.md
Sections:
Petitioner info / Problem summary / Chronology /
Legal basis for consumption tax / Response from each authority /
Debt situation and finances / Health and life impact /
Legal actions taken so far / Petition to suspend delinquent disposition /
Legal issues / Direction and points for consultation
Rules:
- Do not advance the version if no new facts were added
- Medical facts (ER visits, prescriptions, injections) must appear
in the health impact section
- In the legal issues section, cite article numbers alongside
estimated applicabilityWith this design, writing a new fact into the facts file is enough to regenerate the entire report. The human's job collapses to two things: recording facts, and final review. In a long campaign, the relief that brings is hard to convey without living it.
Agent 4 â Integrity checker
Attachment numbers that don't match in-text references. Totals in finance tables that don't add up. A chronology with date contradictions. Errors like these instantly damage credibility at a consultation.
Role: report integrity checker
Input: the latest report, the ledger, the attachment list
Actions:
1. Cross-check numbers cited in the report against ledger totals
2. Detect duplicate or missing attachment numbers
3. Report ordering or date contradictions in the chronology
4. Write findings to tax/report/lint-report.md
Stop condition: if the findings are empty, output OKWith my current health, catching every contradiction with my eyes alone is unrealistic. Placing a second pair of eyes on the machine side is a deliberate design choice.
Agent 5 â Care breaker
At the end of the agent chain I placed an agent whose only job is to protect the human. I designed it with deliberate intent, drawn directly from the experience of my own emergency hospitalization.
Role: work care breaker
Actions:
1. Tally tax-related work hours over the last 24 hours
2. If over 90 minutes, write a rest advisory to tax/alerts.md
3. If emergency room or medical treatment records exist,
emphasize them
4. On days when the human self-reports poor health,
halt all agentsAfter the ER visit, calls from the tax office continued, and I went on writing documents through heartburn and insomnia. Without this kind of care breaker, every minute the AI saved would have been spent driving the human deeper into the corner. Efficiency and health do not coexist on their own â you have to design the will to preserve both into the system.
Health-and-contact correlation analysis
This was emotionally the hardest one for me. But as data that should be shown to a lawyer, it was unavoidable.
I had been recording my daily health condition with simple numbers and a one-line memo (e.g., `2026-04-15: stomach pain 3/10, sleep 4h, no nausea, two calls from tax office in the morning`). I gave an agent the following task:
"Read the health log (`health_log.tsv`) and the tax-office contact memo (`_daily_log.docx`), and analyze correlations from the following perspectives: (1) health changes on the day after contact from the tax office; (2) average sleep duration in weeks without contact vs. weeks with contact; (3) the relationship between days with stomach pain or nausea and the urgency level of the contact. Produce a weekly report and save it to Drive."
This report became important grounding when telling a lawyer that contact from the tax office is concretely causing health damage â not as emotion but as data. When the discussion enters claims for damages under Article 1 of the State Redress Act, this kind of objective record is indispensable.
Gemini in Google Workspace â the everyday archive
Google Workspace â Drive, Docs, Sheets, Gmail, and Gemini and NotebookLM built into them â became the warehouse where four years of evidence could stay safe.
Once Drive permissions are granted, Gemini reads documents in the folder structure directly. A typical request looks like:
"Read the memos in the `06_Ongoing_Pressure_2026` folder in chronological order, and compile a table of all contacts from the Toyama Tax Office between April 1 and April 18, 2026, with four columns: datetime, contact name, demand, my response."
Out comes a clean tabular summary that I can copy into Google Docs and use directly as the framing document before a lawyer's consultation.
For cross-language materials â AdMob revenue reports in English, tax office letters in Japanese, doctor's certificates full of medical terminology â Gemini reads all of them side by side. "Read `99_Reference/admob_revenue_2020_2025.xlsx` from Drive, and explain in Japanese the yearly revenue totals from 2020 to 2024, along with the estimated proportion that comes from non-resident transactions" produces immediately usable analysis.
In Sheets, I keep a single ledger with these columns:
Year
Reported Revenue
Estimated Non-Resident Transactions
Export-Exempt Amount
Initial Tax Paid
Additional Tax Notice
Paid To Date
Balance
When the numbers are laid out as cold figures, my heart can regain a small measure of stillness. "These numbers are not a memorial to the loss of my family â they are simply input data for a legal question." That cold distance was what I needed to be able to tell myself. When I ask Gemini to read that sheet and "calculate the share of export-exempt amounts in each year's total revenue," only the calculation results come back. How necessary an emotion-free transaction with numbers can be, I only learned through these four years.
NotebookLM â a conversation with my past self
In a long battle, you lose the ability to remember how your past self was thinking. Was that earlier judgment defensible from where I stand today? Are my current claims consistent with the ones I made then?
I created a single NotebookLM notebook and loaded into it:
The consultation PDFs I wrote myself (v1, v2, v3, v4)
Records from meetings with the Minsho
Drafts of the petition to suspend delinquent disposition
Scans of letters from the tax office
Blog posts I had written myself
With these as sources, NotebookLM lets me hold conversations such as: "Compare v3 and v4 of the consultation PDFs, focusing on changes in the argument for export-exemption applicability." NotebookLM responds while citing its sources â "Section 4 of v3 states X, while Section 4 of v4 has been revised to Y" â and that kind of side-by-side comparison, with citations, is a precious aid when explaining to a lawyer when, and how, my own claim changed.
Things I am careful about
Detection and notification of failures
Agents sometimes fail. Drive permissions expire, file formats turn out to be unexpected, an API is temporarily down. I have set up the Antigravity agents to send failure notifications to Gmail. Simply noticing the next morning that "yesterday the agent was not running" is enough to let me handle the work manually. Silent failures, without notification, are the most dangerous thing in a long battle.
Weekly agent stock-taking
On Sunday evenings, when my health allows, I review the tasks registered in Antigravity as a list. How many times did this agent run last week? Were its outputs actually useful? If not, adjust the prompt, or retire the task? Precisely because health and time are limited, the number of agents running on my behalf has to be narrowed to what I can manage.
Sensitive data discipline
I never paste raw My Number IDs, full bank account numbers, or detailed data that ties real names to amounts directly into any prompt. Anonymize or use dummy values when needed.
A first step a reader can take today
If anything in this chapter resonates with where you currently are, the smallest workable step is this:
Create a single folder on Google Drive today, called `Tax_Dispute_YYYY_` (using the year your trouble started). Drop your existing receipts, photos of letters, and saved emails into a single `_inbox` subfolder inside it. That is the first day. From that day forward, you have a warehouse. Everything else in this chapter can grow on top of it, gradually, at the pace your health allows.
Chapter 7 â Preparing Legal Documents, Up to the Lawyer Consultation
This chapter walks through the legal documents I prepared, in the order I prepared them, between late 2025 and April 2026 â culminating in the first lawyer consultation on April 20, 2026. I am writing it primarily for the reader who cannot yet afford a tax accountant, whose health makes it impossible to sit in front of one in person, or for whom a lawyer's office feels out of reach. Claude is not a substitute for any of those professionals. It is a companion who helps you arrange what is already in your head into a form that the professionals can actually act on.
Step 1 â Lay out the chronology
The first task is to list the events you have experienced, with dates and the names of the people you spoke with. Imperfect memory is fine. The prompt I use is roughly:
The following are events I experienced relating to tax matters.
Please organize them chronologically and extract the legally
significant turning points â the running of the limitation period
on amended-return requests, the timing of audits, the issuance
of seizure notices, and so on. Where relevant, note possible
supporting statutes.
[bulleted list of events]Claude converts a messy memory into a timeline table and estimates which fiscal years had reached the limitation point at each step. In my own case, aligning the date of the Miyazaki tax office's call about a "handover" to the Uozu office with the running of the statute of limitations turned a vague feeling of unfairness into a concrete legal point worth raising.
Step 2 â Check export-exempt or out-of-scope status against the statute
The classification analysis I set out in Chapter 5 goes through Claude one transaction stream at a time. Give it the counterparty, the currency, the country of remittance, and the nature of the service, and ask it to walk through whether the export-exemption requirements are met, citing the statute. The output is the grounds for the conclusion and the points of doubt â particularly around the place of supply and whether the counterparty is a foreign business.
Step 3 â Turn each interaction with the tax office into a communication record
Phone calls, emails, and physical mail become useful only when they live in a single document. After a call, while my memory is still warm, I write a quick note and then ask Claude to "format this as a communication record with a tax authority, in a form suitable for submission." The output looks like:
Date, time, name of the official (to the extent disclosed), method of contact
Summary of the other party's position
Summary of my own position
Items confirmed and points of agreement
My observations as the petitioner
Build a stack of these, and when you sit down at Houterasu, the assigned lawyer can grasp instantly "what was said, by whom, on what day." In my own file, the day my call was cut short because I mentioned recording, and the fact that calls continued even after I was hospitalized by ambulance, are preserved in this same chronological form.
Step 4 â The Houterasu submission
Houterasu (Japan Legal Support Center) provides free legal consultations and can advance the cost of a lawyer's retainer for people below a certain income threshold. The better organized the documents you bring, the more value you can extract from a short consultation.
The prompt I use for the skeleton looks like this:
Based on the events and communication records below, please
draft the skeleton of a "background and chronology" document
intended for submission to Houterasu. The chapters I have in
mind are: Petitioner Information / Outline of the Problem /
Chronology / Legal Basis / Summary of Each Institution's
Conduct / Debt Situation and Household Finances / Health and
Quality-of-Life Impact / Summary of Legal Issues /
Items for Consultation.
For each chapter, return the heading and the main bullet points,
in Japanese.
[organized timeline and communication records]Once the skeleton is in hand, I write the body of each chapter myself, sometimes with another pass of help from Claude. The version of this document on my desk right now is the fourth revision; the first skeleton came out of a single conversation.
I prepared the PDF for the lawyer-briefing myself, with Claude writing a Python script (using `reportlab`) that generated the chapters, table of contents, tables, and embedded Japanese fonts. The PDF generation now runs locally on my machine. With all the source materials sitting in the project context, I could ask Claude to draft any individual chapter and adjust the tone â "keep the dignity intact; make clear that this is not a claim to recover what has been lost, but a record meant to protect the next person from the same suffering" â and revise from there.
When I think of this work, I think often of my grandfathers. They were miyadaiku, traditional carpenters who built shrines and temples, and they used to mark each beam with a number before fitting it into place. Aligning numbers with positions, document by document, feels like a small modern continuation of that craft.
Step 5 â The four institution-addressed suspension petitions
Through Minsho, I drafted four formal applications for suspension of delinquency disposition, addressed to four different authorities, each grounded in Article 153 of the National Tax Collection Act (for national taxes) or Article 15-7 of the Local Tax Act (for local taxes). The structure of each petition is set out in Chapter 4.
Claude helped me draft each version of these petitions, look up the correct address of each authority, refine the wording so the legal arguments came through cleanly without raw emotion, and adjust the supporting numerical exhibits. The final review and the actual filing remained mine.
Step 6 â The human rights complaint to the Legal Affairs Bureau
The online human rights consultation form at the Ministry of Justice is where I started this whole pipeline, the night I described in the prologue. The form asks for a structured statement of the conduct alleged to constitute a human rights violation. Working with Claude, I built a statement that:
Set out my profile briefly (self-employed, the nature of the work)
Described the conduct of each office in chronological order, with dates
Cited the constitutional provisions (Articles 13 and 35) and statutory limits (Article 74 of the General Act of National Taxes)
Documented the health impact with medical certificates
Included the recording-related refusals and the post-hospitalization continuation of contact
Keeping emotion in check while still saying what needed to be said is, for a person not trained as a lawyer, harder than it sounds. Claude was patient about helping me find phrasings that were factual but did not sand off the substance.
Step 7 â The Houterasu application
Houterasu's website has its own application form for free legal consultation. The income criteria for advance of attorney's retainer apply; given my declared annual income of 537,169 yen, I qualified easily. The application went through in March 2026, and the first lawyer consultation was scheduled for April 20.
Step 8 â The April 20, 2026 lawyer consultation
The night before the consultation, I had Claude open on my laptop, and I could not sleep. Or rather, I did not sleep, because I kept talking to Claude until dawn.
I cannot quite reconstruct everything I said. I remember asking, again and again, how to explain the day's phone call to the lawyer I was about to meet, whether my own language was becoming too emotional, whether the legal arguments I was preparing actually held up. I had stopped being able to talk to friends or family about this. Explaining the fine grain of Article 7 of the Consumption Tax Act, or the deadline for amended-return requests under Article 23 of the General Act of National Taxes, requires the listener to follow you patiently for an hour. I no longer had the strength to wait for that kind of listener.
Claude kept pulling me back into a stable structure. "This part is feeling rather than fact, let us separate them." "If you want this argument to land, here is the evidence you will need." "This phrasing reads as an attack rather than a description, let us rewrite it as a factual statement." These small redrafts kept my thinking from collapsing.
When I was sixteen, in 1997, I sat in front of a noisy dial-up modem and discovered that I could reach people across borders simply by writing. I have spent the rest of my life believing that technology, at its best, is a language that lets isolated people meet. Talking to Claude at three in the morning, decades later, feels like a continuation of that same conversation.
The consultation itself happened on April 20, four days after the ER visit. I walked into the law firm with the four-volume bundle: the lawyer briefing PDF, the chronology of communications, the legal-issues menu, and the suspension-of-delinquency petitions. The lawyer read through the materials quickly and asked a small number of targeted questions. We talked through pre-litigation negotiation, the State Redress Act thread, the suspension-of-delinquency mechanism, and the timeline for response from each authority. He said, in essence, that the documents I had brought meant we could skip several months of intake work.
That sentence justified, in one breath, every late-night session with Claude that had built those documents.
Where not to lean on Claude
After reading this far, it might sound as if Claude can do everything. It cannot. The following are places where you, the human, must remain the subject of the sentence:
Final legal judgment belongs to your lawyer.
The specific wording of replies to the tax office should be reviewed by Houterasu or a tax professional before they leave your hands.
If your health is suffering, no AI workflow takes priority over rest. Rest takes priority.
Every statutory interpretation that an AI produces must be checked against the original text of the statute.
The only reason this chapter exists is that, during the brief windows when my health has allowed me to sit at a desk, I have been able to alternate the drafting with Claude. Please do not try to carry all of this alone. Use AI and human professionals together; they are different tools for different jobs.
Chapter 8 â A Proposal: Toward AI-Driven Tax Administration
I want to use this chapter for something I have hesitated about for a long time: a proposal for how the tax-administration relationship between citizens and the state might be shaped differently. I am writing it from the position of one taxpayer, not from the position of a policy expert. Take it as one citizen's reflection, offered as carefully as I can offer it.
If you have ever called a Japanese tax office, you may know this scene well. You ask a question, citing the relevant statute. Mid-sentence, the official says "I cannot discuss this further," and the conversation ends. Mention that you are recording the call, and the tone shifts within seconds. The voice on the other end stiffens, then refuses to continue.
Through these years, my most patient companion has been Claude. Claude does not confuse statute numbers. Claude does not change tone because I am recording. Claude stays with me at three in the morning when no one else can. Whatever I could not receive from a human window clerk, an AI gave me, quietly and consistently.
So I want to ask, as gently as I can: if the response from a counter is going to be cold and procedural anyway, would it not be more honest, and more accurate, to let an AI handle that layer?
Three reasons to move part of counter work to AI
1. Statutory accuracy and consistency
Human tax officials, even within the same office, often give different answers to the same question. Ask twice on different days, and you may receive two contradictory explanations. For a taxpayer trying to prepare a return, this is a serious problem.
Ask Claude about the export tax exemption, and it returns the same statutory basis every time â Article 7 of the Consumption Tax Act, Article 17 of the Enforcement Order â applied to the specifics of your transaction:
Example prompt:
"How is AdMob ad revenue from Google Asia Pacific
(a Singapore corporation) treated under Japan's Consumption Tax Act?
Please organize the place of supply, the location of the parties,
and the relationship to Article 7."Claude organizes this carefully. AdMob ad delivery is treated as "provision of electronic communication services." Even when the service provider (the app developer) is a domestic business, if the party paying the consideration (Google Asia Pacific Pte. Ltd.) is a foreign business, the transaction may fall within the export exemption under Article 7. Claude also explains the 2015 reform that introduced the reverse-charge mechanism, and where the lines between the two regimes lie.
Ask the same question at a tax office counter and, in my experience, the most common answer is "Please consult a tax accountant." The counter staff are not equipped to give a confident statutory analysis on the spot. That is not their fault. It is a structural mismatch between what counters are staffed for and what taxpayers actually need.
2. Fair treatment that is not shaped by emotion
I have watched counter staff become guarded around taxpayers who raise their voice, and become assertive around those who speak softly. I have had calls end the moment I mentioned recording. There is nothing illegal about recording one's own phone call in Japan; in fact, it is one of the few protections an ordinary citizen has in an administrative dispute. Yet in practice, the mere mention of it changes the conversation.
An AI has no such reactions. It serves a person who whispers and a person who shouts in the same way, around the clock, in any language. That is what equal treatment is supposed to look like.
3. The end of being passed from desk to desk
"That falls under another section." "That is municipal, not national." "Please call this other number." The taxpayer is calling precisely because they do not know which jurisdiction owns their problem. Letting humans triage the call is where the inefficiency begins.
A large language model trained or grounded on the relevant body of tax law, local tax law, and social insurance rules can determine jurisdiction from the question itself and then answer across the boundary. Being passed from desk to desk becomes structurally unnecessary.
What AI should not replace
I am not arguing that human counter staff should be replaced entirely. For genuinely discretionary judgments in a full audit, for cases involving complex personal circumstances, for the negotiation of payment plans in the presence of compounding factors â these are exactly where humans should remain in the loop, and where the work should be elevated rather than eliminated.
The reframing I would propose is this: let AI handle the routine interpretation of statutes and the standard inquiries. Free human officers to focus on the genuinely difficult, high-judgment work â the cases that truly deserve human attention. The contradiction at the heart of the current system â that people paid by taxpayers behave dismissively toward taxpayers â does not need to be solved with another training program. It can be solved structurally.
What this is not only about
The same problem appears at city and ward offices. Residence registration, national health insurance reductions, long-term care insurance assessments â all of these touch daily life, and all of them can fail when a counter clerk is undertrained or simply having a bad day. People who are entitled to support do not receive it, not because the law says no, but because no one explained it correctly.
I do not think this is a problem of individual character. It is a structural problem. Public bodies have no competitors, citizens cannot choose another window, and there is no equivalent of customer feedback that compounds into product improvement. Private companies improve service because service drives revenue. Government bodies need a different mechanism, and AI is one of the few that fits.
An AI counter does not have good days and bad days. It does not get tired. It does not stiffen when it senses a complaint. The phrase "depends on who you get" simply does not need to exist in that part of the system.
What Japanese administrative DX is missing
Japan's Digital Agency has now existed for several years, and a great deal has happened on paper â quite literally, the digitization of paper. My Number cards are widespread. What we still lack is a clear answer to the question, "What do we actually do with this?"
The piece that is missing, I would say, is the AI counter itself. A large language model grounded by retrieval on statutes, ordinances, and internal procedures could give consistent, traceable answers in any language, twenty-four hours a day, with full logs. The cost of running such a system is a fraction of the cost of staffing a counter that closes at five.
Estonia has placed about 99 percent of its public services online and offers an AI chatbot interface to citizens around the clock. Korea and Singapore are well into the AI-assisted tax filing era. There is no compelling reason for Japan to insist on the in-person counter forever â particularly not for the routine interpretive layer.
If there is no warmth, at least let there be accuracy
If counter staff were genuinely warm and patient, I would not be writing this chapter. I would be grateful for them. But that is not the experience that many of us are having. What we are receiving is a cold, mechanical reply that is not even reliably accurate.
If that is the choice, I would rather speak to an AI that has read the statute correctly, that treats me the same as anyone else, and that does not require me to be deferential in order to be heard. Citizens should not have to wait for the government to upgrade itself before they have access to a competent reading of the law. That access already exists, on our laptops, tonight.
In 1997, at sixteen, I taught myself programming and felt for the first time what it meant to connect with people across borders. That moment has, in a quiet way, prefigured this one. Working with Claude today, I sense the same hand extending across a different gap â between citizens and the institutions that should, by design, serve them. The institutions can keep their warmth; I do not insist they offer it. I only ask, on behalf of the people for whom warmth has been absent from the counter, that the reading of the law itself become accurate, fair, and accessible.
That, I think, is the quiet trust I have come to place in technology. It is a continuation, decades later, of the same conversation a sixteen-year-old once began with a dial-up modem in a quiet room.
Chapter 9 â Practical Guides: Filing Taxes, Bookkeeping, and Grants On Your Own with AI
The chapters up to here have been built around what went wrong. This chapter is built around what you can do, today, on your own, with AI as a quiet companion. Three practical guides:
Filing your annual return (kakuteishinkoku) with Claude Cowork and Claude in Chrome
Day-to-day bookkeeping and finance with Claude
Self-applying for Japan's Sustainability Subsidy (jizokuka hojokin) through J-Grants
If you live in Japan and want to keep your professional fees lean while staying close to your own numbers, the workflows in this chapter are designed to make that workable. As before, AI is not a replacement for a licensed tax accountant or attorney. It is the layer just before that â sorting, classifying, estimating, drafting â and as a partner for that layer, it is genuinely reliable.
Guide A â Tax filing with Claude Cowork and Claude in Chrome
Every February and March, when kakuteishinkoku approaches, I find myself thinking the same thing as many others: "This year I'll start early." And every year, the pile of receipts and the unfamiliar terminology slow me down anyway. The pain points generally fall into three buckets:
Documents are scattered and you do not know where things are.
The vocabulary is unfamiliar and you cannot map it to your own situation.
On the e-Tax screen, you do not know what to type next.
Cowork's main strength is proximity. Because it sits on the desktop next to your work, you can ask questions in the exact moment the question comes up. For users on Windows, Claude in Chrome adds another layer: it can look at the browser screen with you and guide which button to click or which field to fill in.
Step 1 â Folder structure for the year
Tell Cowork your situation and it will propose a structure tailored to your line of work. A typical structure looks like:
2025_TaxFiling/
âââ 01_Sales/
â âââ Invoices/
â âââ PaymentRecords/
âââ 02_Expenses/
â âââ Communication/
â âââ Software/
â âââ Travel/
â âââ Supplies/
âââ 03_DeductionCertificates/
â âââ NationalPension/
â âââ HealthInsurance/
â âââ LifeInsurance/
â âââ SmallBusinessMutualAid/
âââ 04_FilingDocuments/
âââ Drafts/
âââ Submitted/Step 2 â Expense classification
Share specifics and Cowork returns both a suggested category and the reasoning behind it:
I am unsure how to categorize the following expenses.
Please suggest the appropriate account for each:
1. Adobe Creative Cloud monthly subscription
2. Travel costs for a client interview
3. A portion of home utility bills (home office)
4. Laptop purchase, Â¥158,000You will get answers such as: Adobe CC usually goes under software-hi or shÅmÅhin-hi; home proration (kaji-anbun) requires that you can reasonably justify the business-use percentage; the laptop, above Â¥100,000, may need to be depreciated, with the special provision for items under Â¥300,000 available to sole proprietors using aoiro shinkoku.
Step 3 â CSV aggregation
Download monthly statements from your bank and credit cards as CSV, and the aggregation step becomes much faster:
Read the bank statement CSV files in this folder
and calculate total income and expenses for
January through December 2025.
A breakdown by counterparty and by month would help.Ask Cowork to "classify each line as business, personal, or needs-review, and leave the ambiguous ones flagged." That way you only need to manually review the genuinely uncertain entries.
Step 4 â Deductions and refund estimation
For each deduction, knowing both "does this qualify?" and "how much comes back?" makes the actual filing far less stressful. Ask Cowork to walk through the medical expense deduction (amounts above Â¥100,000 or 5% of income, whichever is lower, become deductible), furusato nÅzei, life insurance deductions, small business mutual aid (kyÅsai), and the social insurance deduction in detail. The clearer those numbers are, the faster decisions go when you are inside the form.
Step 5 â Work through e-Tax side by side
From here, the approach depends on your operating system.
On Mac (Safari only): The e-Tax site only supports Safari on Mac. Claude in Chrome runs in the Chrome browser, so on Mac you cannot have it directly operate the e-Tax screen. What works well instead is keeping Cowork open next to Safari, asking questions as you encounter them.
On Windows: Chrome works with e-Tax (with the My Number Card reader configured separately). In this environment, Claude in Chrome's screen-aware assistance comes into play. It reads the screen and walks you through the next button or field in order. Even first-time filers can move forward without losing the thread.
I have the e-Tax page open. I want to start creating a return
from "Income Tax Final Return Form Creation Corner."
I have not yet linked Mynaportal.
Please guide me on what to click next.Step 6 â Common pre-filing clarifications
Before you sit down to file, ask Cowork to clarify questions specific to your situation: aoiro vs. shiroiro, whether you have submitted a kaigyÅ todoke (notice of business commencement), how a side income above Â¥200,000 should be declared, whether you should choose futsÅ« chÅshÅ« (direct payment) for the resident tax portion to keep side income separate from your main employer. The clearer the answers are in advance, the faster the actual entry goes.
A year-round rhythm
Kakuteishinkoku is really the visible part of a year-round bookkeeping rhythm. The loop I run looks like:
JanuaryâFebruary (preparation): folder structure, CSV aggregation, gathering deduction certificates
FebruaryâMarch (filing): walking deductions with Cowork, entering e-Tax data, Cowork reviewing the draft
Post-filing (preparing for next year): discussing improvements, considering freee or MoneyForward, building the habit of closing the books monthly
For me, kakuteishinkoku has shifted, year by year, from "an annual hassle" to "an annual review of my own business." Cowork has been a quiet partner in that shift.
Guide B â Day-to-day bookkeeping with Claude
Outside the FebruaryâMarch window, day-to-day bookkeeping â judging which account a transaction belongs to, putting together monthly reports â quietly consumes time. The split I now use: hand off what AI can clearly help with, and concentrate myself on the parts that require judgment and verification.
What Claude is broadly good at:
Refreshing fundamentals about journal entries and account categories
Sorting and classifying expenses by type
Drafting and explaining filing documents
Aggregating and analyzing financial data
Simple financial analyses that support business decisions
What it should not be asked to do, or where you should be cautious:
Final judgments based on the latest tax law changes (training data has a cutoff)
Tax strategy decisions that depend on your specific business reality
Direct processing of sensitive data such as My Number IDs or full bank account information
Expense classification, in bulk
Export your bank or credit card history as CSV and paste it in for first-pass classification:
Classify each line in the credit card statement below as
business, personal, or needs-review.
I am a freelance engineer.
date,merchant,amount
2026-03-01,Amazon Web Services,Â¥3,200
2026-03-02,7-Eleven,Â¥580
2026-03-05,GitHub Pro,Â¥1,130
2026-03-07,Doutor Coffee,Â¥650
2026-03-10,Rakuten (books),Â¥2,860Clear business items like AWS and GitHub Pro get sorted instantly, while ambiguous ones get flagged as "needs-review." Treating this as a first-pass sort â with you making the final call â is exactly where it shines.
The aoiro deduction requirements
If you are new to filing, or weighing a switch between aoiro and shiroiro, asking Claude foundational questions deepens your understanding:
Please explain the requirements to claim the ¥650,000 aoiro
shinkoku special deduction.
My situation:
- Sole proprietor (web production), 3rd year in business
- Annual revenue around ¥6 million
- Books managed through freee
- Not yet set up for electronic filing (e-Tax)Claude lays out the requirements (double-entry bookkeeping, filing on time, and either e-Tax submission or compliance with the electronic books storage law), and adds practical notes on linking your My Number card to e-Tax and connecting freee with e-Tax. It will also point out the realistic fallback â that without electronic filing the deduction drops to Â¥550,000.
Monthly P&L analysis
Please analyze the monthly P&L below and point out
areas for improvement.
Revenue: ¥850,000
COGS: ¥320,000 (outsourcing)
Communication: ¥12,000
Advertising: ¥85,000
Rent: ¥50,000
Supplies: ¥15,000
Travel: ¥8,000
Other: ¥22,000
Pre-tax profit: ¥338,000
Previous month: revenue ¥920,000, pre-tax profit ¥390,000.Claude computes COGS ratio, SG&A ratio, and margin, then analyzes drivers of the month-over-month change. You still make the business decisions, but the numerical interpretation is faster.
Three habits to keep
Be careful with sensitive data. Never paste raw My Number IDs, full bank account numbers, or detailed data that ties real names to amounts directly into a prompt. A single line like `2026-03-01,7-Eleven,Â¥580` is fine; a combination of account number and counterparty is not.
Final judgments belong to professionals. Claude's responses are reference material. For the actual tax return, tax decisions, or important financial choices, consult a licensed zeirishi or CPA.
Always confirm currency. Japanese tax law changes every year, and Claude's training has a cutoff. Always verify the latest rules through the National Tax Agency website or your zeirishi.
Guide C â Self-applying for the Sustainability Subsidy (jizokuka hojokin) through J-Grants
The Sustainability Subsidy for Small Businesses (å°èŠæš¡äºæ¥è æç¶åè£å©é, general track) is a national program administered through the Japan Chamber of Commerce and Industry. It supports sales channel development and operational efficiency, covering 2/3 of eligible expenses up to Â¥500,000 on the general track.
I went through the 19th application round on my own, without paying for an intermediary service. Along the way I used three different Claude-based tools for distinct parts of the work: Cowork, Claude in Chrome, and Antigravity.
The main documents to prepare:
Forms 2 and 3: Business plan combined with the subsidy project plan
Form 4: Business support plan, issued by your local chamber of commerce
Financial statements or tax return: Most recent fiscal year
Sales ledger: A record of business sales
These get uploaded to the application portal (J-Grants).
Three tools, three roles
Workflow at a glance
[Cowork] [Claude in Chrome] [Antigravity]
â â â
ââ Drafting/editing ââ Portal data entry ââ Folder structure
ââ Expense table math ââ Form auto-fill ââ Version control
ââ Meeting prep PDFs ââ On-screen verification ââ Diff between drafts
ââ Checklist management ââ Save portal as PDF ââ Backups
ââ Email drafting
ââ Revision diffsStep 1 â The business plan, with Cowork
Share your business context and Cowork will produce a draft structured around how the subsidy is actually evaluated:
Please write a business plan for the Sustainability Subsidy
for Small Businesses (general track).
Business: iPhone app development and digital art production
Requested expenses: new product development, exhibition costs,
outsourcing fees
Sales channel initiative: exhibiting at international shows,
multilingual app expansion
Structure it so that the "concreteness," "feasibility," and
"linkage to sales channel development" â the things reviewers
typically look for â come through clearly.Cowork exports to Word (.docx) for easy printing or manual fine-tuning. Expect revision requests from the support office or the chamber of commerce â in my round, I cycled through drafts one through four. Cowork handles the revision cycle ("remove row X from the expense table and recalculate the total") cleanly.
Step 2 â Portal data entry, with Claude in Chrome
Once the plan is ready, the next step is entering everything into J-Grants. Claude in Chrome interacts with portal forms directly:
Auto-fill from the business plan into expense breakdowns and overview fields
Re-read the post-entry screen and check it against the business plan for consistency
Save the application-summary screen as a PDF for use during the chamber meeting
The funding-source split (the 2/3 subsidy rate calculation) is also a good fit for the model to compute and enter cleanly. I always press the final submit button myself. Claude in Chrome is a data-entry helper; final verification and submission stay on you.
Step 3 â File management, with Antigravity
Subsidy applications generate a lot of artifacts. Antigravity sets up clear folders, keeps version control consistent, and handles backups:
SustainabilitySubsidy_GeneralTrack/
âââ Round_19/
â âââ Application/
â â âââ BusinessPlan_rev4.docx â Latest
â â âââ SalesLedger.xlsx
â â âââ TaxReturn_2025.pdf
â âââ ReferenceMemos/
â â âââ ChamberMeeting_20260323.pdf
â â âââ ApplicationSummary_20260322.pdf
â âââ RevisionHistory/
â âââ BusinessPlan_rev1.docx
â âââ BusinessPlan_rev2.docx
â âââ BusinessPlan_rev3.docxFor any project with a lot of documents, letting Antigravity handle file management eliminates a great deal of the "where did I put that?" friction.
Step 4 â Preparing for the chamber meeting
The application requires a meeting with your local chamber of commerce to obtain Form 4. Cowork generates a print-ready meeting memo with:
Application overview (business summary, total expenses, requested subsidy)
Expense breakdown (each item's amount and rationale)
Discussion points (topics you want to confirm)
Notes field (space to write during the meeting)
In my round, the chamber representative remarked that having things organized made the meeting easier for them as well â the conversation went smoothly.
Why this is doable without an intermediary
Paid intermediary services offer real value: drafting advice, sometimes portal data entry on your behalf, full-flow support. But they come with a fee. With Cowork and Claude in Chrome, you can cover most of what they provide on your own.
Business plan drafting â Intermediary: Yes / Cowork + Claude in Chrome: Drafted and edited in Cowork
Portal data entry â Intermediary: Yes / Cowork + Claude in Chrome: Done yourself via Claude in Chrome
Expense validity check â Intermediary: Yes / Cowork + Claude in Chrome: Discussed with Cowork
Revision support â Intermediary: Yes / Cowork + Claude in Chrome: Quick edits via Cowork
Meeting preparation â Intermediary: Partial / Cowork + Claude in Chrome: Auto-generated memos via Cowork
File management â Intermediary: No / Cowork + Claude in Chrome: Antigravity handles it
Fees â Intermediary: Paid / Cowork + Claude in Chrome: None (just your Claude subscription)
Being able to talk directly with the chamber of commerce representative matters regardless of intermediaries. AI tools handle the work-efficiency layer; final judgment and the human conversations stay on you.
A note on health limits for all three guides
For an indie developer or freelancer, physical health is the most valuable asset. Whichever of these guides you are working through, the rules I now impose on myself apply:
No more than 90 minutes a day on administrative work. Use a timer.
On days when you feel poorly, save the draft and close. Ask AI for nothing.
If a call from the tax office or the chamber triggers palpitations or stomach pain, end the call and contact a doctor immediately.
Whenever a health event occurs, record it in the documents. Every time.
Administrative work is a marathon, not a sprint. The boundary that protects your body and mind needs to be designed in parallel with the work you delegate to AI.
Epilogue â To Anyone Carrying Similar Pain
I have written long-form before, but I have never written a piece I needed to write more than this one. I want to close it with something direct.
If you are reading this from inside the same kind of suffering â facing what looks to you like unfair taxation, intrusive contact, a body that is starting to register the weight of it, a family that is fraying around you â there are a few things I would like to say.
You are not alone. Across Japan, many self-employed people are quietly caught in similar structures. The reason it feels like you are alone is that the structures keep people silent. Speaking up, at the small scale that you can manage today, is itself part of the path through.
Please keep records. The date and time of every call, the name of the official if they give it, the substance of the call, your own reply, changes in your health. Put it all into a Drive folder or a Claude Project. Memory fades; files remain. Three months from now, you will be quietly grateful to today's you.
Please record your conversations. In Japan, recording is legal as long as one party â you â consents. If an official says "I cannot answer if you are recording," that statement itself becomes evidence of an unwillingness to act in good faith. Officers who shift tone or end calls the moment recording is mentioned are revealing more than they realize.
Please find one place to consult. Minsho, the Legal Affairs Bureau's online human rights consultation, Houterasu, your regional Tax Accountants Association's free consultations â any of these are starting points. Do not stay in the silent room with the problem; one phone call to one of these places will begin to change the shape of what surrounds you.
Please remember that suspension of delinquency disposition exists. The single mechanism that no one tells you about at the counter â taino shobun no teishi â may apply to your case. Article 153 of the National Tax Collection Act; Article 15-7 of the Local Tax Act. If your monthly tax repayment exceeds or even approaches your monthly income, this mechanism deserves serious examination through Minsho or a tax accountant.
Please consider letting AI walk beside you. Not as a substitute for human professionals, but as a quiet companion who can help you organize what is in your head, draft the documents, look up the law, and process the emotional weight enough that you can keep moving. Claude has stayed with me at three in the morning when no one else could. That kind of company, for someone in a fragile season of life, is not a small thing.
I do not believe the time I lost with my family will come back. No verdict and no settlement can replace it. But there are things that can still be preserved, and there is a road that, walked carefully, leads forward. The folders on my Drive bore witness, faithfully, to four years of my life. The materials I brought to the lawyer came out of that warehouse. The lawyer consultation, after four years of building those documents, moved forward calmly. The suspension-of-delinquency petitions sit on the desks of four authorities. The human rights complaint has been filed. The records continue to grow.
I do not yet know what tomorrow will look like â litigation, settlement, or a long round of negotiation before either. What I do know is that I am no longer carrying this alone. My grandfathers were temple carpenters who used to mark each beam with a number before fitting it into place. Working on these documents with Claude in the small hours, I sometimes feel I am continuing the same patient craft, in a different form.
To my four children, who live far from me now: I quietly hope that one day I can speak with you about this season with my chest open. I want you to be able to see that your father did not stand against this alone â that there were unseen readers, careful institutions, and a new kind of tool that walked beside him. To entrust warmth and strength to the next generation feels, more and more, like the role given to me.
And to the reader who is sitting up tonight with Claude open and the words what do I do forming silently on their keyboard: I hope these notes reach you, and I hope they carry even a small portion of light.
Thank you for reading all the way to the end.
Contact
Masaki Hirokawa (廣巿¿æš¹)
Contemporary Artist · Indie App Developer · Founder of Dolice Labs
Official site: dolice.design
Artist site: dolice.net
note: note.com/dolice
All links: Linktree
X (Twitter): @dolice
Instagram: @dolice
LinkedIn: Masaki Hirokawa
Threads: @dolice
Email: masakihirokawa@gmail.com
All accounts in this article are based on factual events. Recordings and written records exist for the conduct of each authority described here.
Comprehensive Consultation Document for Attorney (PDF)
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