Japan Tax Residency and Reporting Overseas Stock Gains

This article is part of Zagdim’s wiki series on tax matters for people moving to Japan. It sets out how a person’s Japanese tax-residency status affects the taxation of gains from overseas stocks, for readers considering a move to Japan who hold stocks, funds, or other assets abroad.

**Example (used throughout this article)**: Mr. Chen is not a Japanese national and holds stocks and funds in a brokerage account outside Japan. He is planning to move to Japan for work. Each section below applies the rule to his situation.

Am I a Japanese Tax Resident?

If you have a residence in Japan, or have had a domicile there for one year or more continuously up to now, you count as a “resident” (*kyojusha*) for Japanese income tax purposes.

Japan divides residents into three categories, each with a different scope of taxation:

Non-permanent resident: A resident who does not hold Japanese nationality and, within the past 10 years, has had a domicile or residence in Japan for a total of five years or less.
Resident other than a non-permanent resident: A resident who does not meet the non-permanent resident conditions above.
Non-resident: An individual who does not qualify as a Japanese resident.

Applying this to Mr. Chen: once Mr. Chen has had a residence in Japan for one year or more continuously, he becomes a resident. If his total domicile or residence in Japan over the past 10 years is five years or less, he is a non-permanent resident.

Do I Need to Report Gains From Selling Overseas Stocks in Japan?

Whether you need to report depends on which of the three categories you fall into, since each has a different scope of taxation in Japan.

Status	How It’s Determined	Scope of Taxation in Japan
Resident other than a non-permanent resident	A resident who does not meet the non-permanent resident conditions	All income is taxed regardless of whether it arose inside or outside Japan; gains from selling stocks overseas are, in principle, taxed the same as a sale made in Japan
Non-permanent resident	No Japanese nationality, and domicile or residence in Japan totaling five years or less within the past 10 years	Income other than foreign-source income, plus any foreign-source income that is paid within Japan or remitted into Japan
Non-resident	Does not qualify as a Japanese resident	In principle, only Japan-source income

“Foreign-source income” means income arising from a place outside Japan.

If you are a non-permanent resident, pay particular attention to where the money flows. Whether foreign-source income is paid within Japan, or remitted into Japan, affects the scope of what Japan taxes.

Separately, a “tax treaty” is an agreement between two governments that sets out which side has the right to tax. Under a tax treaty, income tax on gains from selling overseas stocks may fall only to the Japanese resident’s country of residence, with the other country not applying a corresponding income tax. This does not mean every overseas stock gain is taxed only in Japan.

Applying this to Mr. Chen: while Mr. Chen is still a non-permanent resident, whether a stock sale gain counts as foreign-source income, and whether that money is remitted into Japan, will affect the taxable scope. Once he no longer meets the non-permanent resident conditions and becomes a resident other than a non-permanent resident, both his Japan-source and foreign-source income fall within Japan’s taxable scope.

For a fuller breakdown of income categories and how to report them, see Zagdim’s companion article on capital gains, property sales, and overseas investment tax for investors moving to Japan (linked in the Localized notes below).

If I Already Paid Tax Overseas, Will Japan Tax Me Again?

A Japanese resident can apply for a “foreign tax credit” (*gaikoku zeigaku kōjo*), which deducts foreign income tax already paid from the Japanese income tax owed. The amount that can be deducted is capped.

The cap is calculated based on the proportion that “adjusted foreign income” represents of “total annual income.”

To apply, you attach the following to your final tax return (*kakutei shinkokusho*, the return filed each year for income tax):

A statement detailing the foreign tax credit (for residents)
A copy of the foreign income tax return, or a substitute document
If the tax has already been paid, proof of payment as well (for example, a tax payment certificate or a withholding tax statement)

These are not the only required attachments. Check the full list published by the National Tax Agency before preparing your application.

What Else Should I Watch for With Overseas Assets?

First, people with substantial assets must file a Statement of Overseas Assets. This is a document that reports to the tax authorities what assets you hold overseas.

Who must file: Residents other than non-permanent residents.
When it applies: When the total value of overseas assets exceeds JPY 50 million as of December 31 of that year.
Filing deadline: By June 30 of the following year.
What to report: The type, quantity, and value of the assets.
Exception: Overseas inheritance received in the year inheritance begins is subject to a separate specific exclusion.

Second, when leaving Japan, you may be subject to “exit tax on departure from Japan” (a special rule for capital gains and similar income on departure from Japan).

This means that when you leave Japan, assets you still hold may be treated as if they had already been sold, even though they have not. The tax authority taxes the “unrealized gain” (*fukumi-eki*), which is the portion of an asset’s value that has increased but has not yet been locked in through a sale.

This rule applies only to residents who meet specific conditions, and only where the applicable assets held at the time of departure are worth JPY 100 million or more. Not everyone holding assets worth JPY 100 million or more is subject to it.

Applying this to Mr. Chen: when Mr. Chen eventually leaves Japan, he cannot just check whether his assets reach JPY 100 million — he also needs to confirm whether he meets the other conditions. See Zagdim’s companion article on capital gains, property sales, and overseas investment tax for investors moving to Japan (linked in the Localized notes below) for more detail.

For how crypto assets are taxed, see Zagdim’s article on how Japan taxes crypto asset gains, miscellaneous income, and reporting risks (linked in the Localized notes below).

Taxable scope in Japan varies by residency status and by how money is moved, so individual circumstances differ.

Frequently Asked Questions

If I’m not a Japanese resident, do I still owe Japanese tax on overseas stock gains? In principle, no. A non-resident is, in principle, taxed only on Japan-source income. Start by checking whether you have a residence in Japan, or have had a domicile there for one year or more continuously up to now.

Does remitting money into Japan affect a non-permanent resident’s tax? Yes. A non-permanent resident’s foreign-source income is taxed on the portion that is paid within Japan or remitted into Japan. How you remit funds can therefore affect the taxable scope.

Does everyone have to file a Statement of Overseas Assets? No. Only residents other than non-permanent residents whose overseas assets exceed JPY 50 million in total value as of December 31 of that year must file, by June 30 of the following year. Overseas inheritance received in the year inheritance begins is subject to a separate specific exclusion.

Glossary

**Resident (*kyojusha*)**: An individual who has a residence in Japan, or has had a domicile there for one year or more continuously up to now.
**Non-permanent resident (*hieijūsha*)**: A resident without Japanese nationality whose total domicile or residence in Japan over the past 10 years is five years or less.
**Non-resident (*hikyojūsha*)**: An individual who does not qualify as a Japanese resident, and who is, in principle, taxed only on Japan-source income.
**Foreign tax credit (*gaikoku zeigaku kōjo*)**: A system that lets a Japanese resident deduct foreign income tax already paid from Japanese income tax, up to a cap.
**Statement of Overseas Assets (*kokugai zaisan chōsho*)**: A document reporting the type, quantity, and value of assets held overseas to the tax authorities.

About This Data

Facts were checked as of October 21, 2026. The taxable scope for residents, non-permanent residents, and non-residents is based on the National Tax Agency’s explanation in No. 2010; the principles for taxing overseas stock sale gains are drawn from No. 1937.

The document requirements for the foreign tax credit are listed officially in No. 1240. This article covers only the verified items (the credit statement, a copy of the foreign tax return, and proof of payment) and does not list every required attachment. The Statement of Overseas Assets is based on No. 7456. The qualifying conditions for the exit tax on departure from Japan (No. 1478), including which assets are covered and how past residence periods are counted, are flagged here as a general reminder and not worked through item by item.

This article does not provide an item-by-item classification of which overseas stock gains count as foreign-source income, nor the countries and rates covered by individual tax treaties. The taxation of gains from selling overseas property is not covered in this article, pending further verification of the source material.

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Important Notice

This article is a general information summary and does not constitute tax or legal advice for any individual case. Facts were checked as of October 21, 2026. Japanese regulations may be updated; refer to the relevant authority’s current published information, and consult a qualified professional for individual cases.