Japan — Tax Residency (Jusho, Not 183 Days)

Summary

Day threshold

None — Japan has no 183-day rule

Primary test

Jusho (domicile) in Japan

Second route

Kyosho kept continuously for 1 year

Day-one residency

Possible, via the occupation presumption

Day counts

Supporting evidence only

Basis

Income Tax Act; NTA Income Tax Guide §1-3

Authority

National Tax Agency (NTA)

Japan does not use a 183-day rule. Under the Income Tax Act you are a resident if you have a jusho — a domicile, the base of your life — in Japan, or if you have had a kyosho (a place of residence) in Japan continuously for one year or more. A job that requires living in Japan can make you resident from your first day; conversely, spending fewer than 183 days there protects nobody whose life is based in Japan. Day counts are evidence, never the test.

Who it applies to

This matters most if you are:

• Moving to Japan on an employment contract and wondering when Japanese tax starts.
• A remote worker keeping an apartment in Japan while travelling for much of the year.
• An assignee leaving Japan temporarily while your family stays behind.
• A foreign national approaching 5 years in Japan — the non-permanent resident line (tracked separately).

It applies to individuals of any nationality. Japanese nationals are subject to the same domicile test but can never be non-permanent residents, so the 5-in-10 relief below is a foreign-national concept.

The rule — and why it exists

The NTA's Income Tax Guide sets out the definition plainly: a resident is an individual who has a domicile in Japan, or who has had a residence in Japan continuously for one year or more up to the present. Everyone else is a non-resident. Two presumptions do most of the work in practice:

• The occupation presumption. If you have an occupation in Japan that ordinarily requires you to live there for a year or more, you are presumed to have a domicile in Japan — from the start of the job.
• The family-and-assets presumption. If your spouse or other relatives of the same household live in Japan and your occupation and assets point the same way, you are presumed to live in Japan for a year or more, and therefore to be domiciled there.
• Temporary absence does not break it. Leaving Japan for a while, while your household and your residence stay behind, is treated as continuing residence — the clock does not stop and the domicile does not move.

Residents are further split: non-permanent residents (non-Japanese nationals with 5 years or less of aggregate domicile or residence in the last 10) are taxed on income other than foreign-source income, on foreign-source income paid in Japan, and on foreign-source income paid abroad only when remitted to Japan. Everyone else — ordinary residents — is taxed on worldwide income. That five-year line has its own counter; see Japan non-permanent resident.

Why it exists: Japan chose a facts-based test over a bright line. A day threshold is easy to administer but easy to engineer around; domicile asks where your life actually is, which is harder to fake and harder to predict.

Applying the test

There is no number to reach. Work through the questions the NTA asks, in order:

1. 1Does your occupation ordinarily require you to live in Japan for a year or more? If yes, you are presumed domiciled — resident from the start.
2. 2Do your spouse or household relatives and your assets sit in Japan in a way that implies living there a year or more? Same presumption.
3. 3If neither presumption bites, have you maintained a place of residence in Japan continuously for one year? Once that year elapses, you are resident from then on.
4. 4If you left Japan temporarily, ask whether your household and residence stayed. If they did, the absence does not interrupt anything.
5. 5Only then look at days — as evidence of where you actually lived, not as a test you can pass or fail.

Keep the evidence a domicile argument needs: lease or ownership documents, where your family was registered, where you paid social insurance, and a contemporaneous travel log. Bounded's day count is one part of that record.

Examples

Example 1 — resident from day one

Marco signs a three-year contract with a Tokyo employer and arrives in April. His occupation ordinarily requires living in Japan for more than a year, so the presumption makes Japan his domicile immediately. He is a resident from April, with 120 days on the clock in his first tax year — the number is irrelevant.

Example 2 — the one-year route

Priya rents a flat in Fukuoka in June 2025 while working for a foreign employer, with no family or assets in Japan. She is a non-resident at first. In June 2026 her continuous residence reaches one year and she becomes a resident from that point on.

Example 3 — the trip that changed nothing

Kenji is seconded from Osaka to Jakarta for seven months. His wife and children stay in the Osaka house and his belongings remain there. Under the NTA's temporary-absence rule he is treated as still residing in Japan throughout — his day count abroad does not shift his residency.

Exceptions & edge cases

• Non-permanent residents. Non-Japanese nationals with 5 years or less of aggregate domicile or residence within the preceding 10 years get the remittance-basis treatment on foreign-source income paid abroad. Japanese nationals never qualify.
• Dual residence and treaties. Being domiciled in Japan does not stop another country claiming you. A treaty tie-breaker — permanent home, then centre of vital interests — settles it, and that analysis is not a day count either.
• Inheritance and gift tax. Japan's inheritance and gift rules have their own residence concepts and look-back periods, which do not track the income-tax definition. Take advice before a gift or a death in the family if Japan is anywhere in the picture.
• Exit tax. Long-term residents holding large financial assets can face a deemed-disposal exit tax on leaving. Departure planning is a separate exercise from residency counting.
• Re-entry permits are immigration, not tax. The one-year re-entry rule that governs your status of residence is a different clock entirely — see the Japan re-entry permit article.

Common misconceptions

• "Stay under 183 days and Japan cannot tax me." False. There is no 183-day rule. If Japan is your jusho, you are resident on any number of days.
• "I have to be there a year before anything happens." Only on the kyosho route. The domicile presumptions can make you resident from your first day.
• "A long trip abroad resets my residence." Not while your household and your home stay in Japan — that is explicitly treated as continued residence.
• "Non-permanent resident means I pay no Japanese tax on foreign income." Not quite. Foreign-source income paid in Japan is taxable, and foreign-source income paid abroad is taxable once remitted.
• "Bounded's day count decides it." It does not. The counter is labelled as a checklist for exactly this reason — the days are supporting evidence for a facts-based test.

Questions fréquentes

Sources

• National Tax Agency (NTA) — Income Tax Guide 2025, §1-3 (scope of taxation, residents and non-residents)
• National Tax Agency — Income tax information for foreign residents