Tax-Residency Milestones: the 5- and 10-Year Marks

Here’s a quirk of building a life in Japan: the longer you stay, the more of your money Japan can tax — and it happens in steps you can see coming. As a US citizen the US already taxes you on everything, everywhere, every year (see Filing US Taxes from Japan); these milestones are about Japan’s reach, which starts narrow and widens at two big marks — 5 years for income and 10 years for inheritance — plus a separate exit tax. Knowing where the lines fall is what lets you plan around them.

One thing up front, because the words cause endless confusion: these are tax statuses, set by how long you’ve lived here — entirely separate from immigration permanent residence. You can be a “permanent resident for tax” on an ordinary work visa, years before you could ever apply for immigration PR.

The 5-year mark: worldwide income

For your first stretch in Japan you’re a 非永住者hi-eijūsha (non-permanent resident for tax) — defined as a non-Japanese national who has had a home here five years or less of the past ten. In that window Japan taxes:

• all your Japan-source income (your Japanese salary and the like), plus
• foreign income only when you bring it into Japan — paid here, or remitted here.

The planning window. That second rule is the opening: foreign investment income — US dividends, capital gains, rent — that you leave abroad and don’t remit generally escapes Japanese tax during these years. (The US still taxes it; this only narrows Japan’s bite.) See Investing from Japan.

Three catches make this a window to handle carefully, not a loophole:

• Your Japanese salary is always taxed — even if it’s paid into a US account and never moves — because it’s Japan-source, not foreign.
• A remittance can pull foreign income in. Send money to Japan in a year you also had foreign income, and Japan treats the transfer as bringing that foreign income into tax, up to the amount you sent. (See Sending Money Between the US and Japan.)
• Don’t assume “paid to my US account” means “safe” — work it through with a cross-border accountant.

At five years it closes. Once your time here passes five of the last ten years, you’re a permanent resident for tax and Japan taxes your worldwide income, just as the US does. From then on you manage the overlap through the US–Japan tax treaty and the Foreign Tax Credit — and note the exclusion (FEIE) only covers earned income, so investment income has to lean on the credit.

The 10-year mark: inheritance and gift tax

Japan’s inheritance and gift tax has its own, longer clock — and it works unlike the US system: Japan taxes the person who receives, not the estate of the person who died. On a work or student visa (a “Table 1” status) you’re a 一時居住者ichiji kyojūsha (“temporary resident”) for as long as you’ve lived here ten years or less of the past fifteen — and in the typical case you’re taxed only on Japan-situated assets. Your US house, US brokerage, and any US inheritance stay outside Japan’s reach.

Two things end that shelter:

• passing ten of the last fifteen years, or
• switching to a “Table 2” status — permanent residence, spouse of a Japanese national, or long-term resident — which can never be a 一時居住者ichiji kyojūsha.

Either one makes you a worldwide taxpayer, so Japan can tax your global assets — including everything you hold in the US — when you receive an inheritance or gift, or when your own heirs inherit.

The US side. The US taxes the deceased’s estate (and a US citizen’s worldwide estate, wherever they live), but with a large exclusion — about $14 million in 2025. Japan taxes the heir, with a far smaller basic exclusion (¥30 million + ¥6 million per heir), so Japanese tax can bite at much lower numbers. A US–Japan estate-and-gift tax treaty exists to soften the double taxation, but the two systems are structurally mismatched and the credit mechanics are genuinely intricate — firmly specialist territory. (More in US–Japan Inheritance and Estate Tax (in progress).)

(One nuance: this is a matrix — who’s taxed on what also turns on the other party. If the person you inherit from was Japanese, or a long-term resident here, you can be pulled into worldwide tax even inside your ten-year window. Check your own situation.)

The other 5-year mark: Japan’s exit tax

Easy to overlook: Japan has its own exit tax (国外転出時課税kokugai tenshutsuji kazei). When a resident leaves Japan holding ¥100 million or more in financial assets (securities, funds, derivatives — counting NISA and assets held abroad), Japan taxes the unrealized gains as if everything were sold on the way out.

The carve-out that matters for expats: it applies only to someone resident more than five of the last ten years — and years spent on a work or student (Table 1) visa don’t count. So most Americans here on a work visa never trigger it, however long they stay. It mainly catches Table 2 holders — permanent residents and spouses of Japanese nationals — who cross the five-year line with a large portfolio.

For a US person it’s a departure headache: Japan taxes a gain you haven’t actually realized, while the US taxes the real gain later when you sell — a timing-and-credit mismatch with no clean fix. Plan any departure with a cross-border advisor.

Coming off SOFA

A wrinkle for anyone in Japan on SOFA status (military, the civilian component, or a designated contractor), because SOFA sits outside the Japanese tax system: under the agreement, time in Japan solely because of SOFA status isn’t counted as residence or domicile “for the purpose of Japanese taxation.” That cuts two ways when you transition off SOFA onto an ordinary visa — and the two cuts aren’t symmetric.

• The income clock likely resets in your favor. Because SOFA years generally don’t count as Japanese tax residence, switching to a normal status of residence appears to start the 非永住者hi-eijūsha clock fresh — giving even a long-time SOFA resident a new ~5-year window of the favorable, foreign-income-only treatment. (This rests on the treaty’s wording rather than a Tax Agency rule that names SOFA, so treat it as a strong planning position to confirm with a cross-border tax accountant, not a settled certainty.)
• The inheritance shelter does not reset — don’t count on it. This is the trap. SOFA carries no inheritance- or gift-tax shelter of its own (it covers personal effects, not real estate, investments, or worldwide assets), and the 10-of-15-year 一時居住者ichiji kyojūsha clock has no equivalent “subtract the SOFA years” mechanism — so years you were physically here can still push you past the line into worldwide-asset exposure. And the usual path off SOFA for someone married to a Japanese national is a spouse visa — a Table-2 status, which gets no 一時居住者ichiji kyojūsha shelter at all. If you’ve been here a long time on SOFA, assume your inheritance and gift exposure is the worldwide kind, and have it reviewed.
• The exit tax stays clear — on a work visa. SOFA years don’t count toward its 5-of-10-year test, and work or student-visa years are carved out anyway, so a former-SOFA person who moves to a Table-1 work visa stays outside the exit tax. (A Table-2 status starts that clock.)

All of this is nuanced treaty-and-tax interpretation, with no Tax Agency ruling squarely on the SOFA transition — flag-and-confirm territory. See Transitioning Off SOFA Status and SOFA Status and Your US Taxes.

The short version

• These are tax statuses based on time in Japan — separate from immigration PR. The US taxes you on worldwide income the whole time regardless; the milestones only change Japan’s reach.
• 5-year income mark: for your first ≤5 of 10 years you’re a 非永住者hi-eijūsha — Japan taxes Japan-source income + foreign income brought into Japan. Foreign investment income left abroad can escape Japanese tax (the US still taxes it; a remittance can pull it in; your Japanese salary is always taxed). Past 5 of 10 years → worldwide income.
• 10-year inheritance/gift mark: on a work/student (Table 1) visa you’re a 一時居住者ichiji kyojūsha, taxed only on Japan-situated assets for up to 10 of 15 years. Past that — or on a Table 2 status (PR, spouse) — Japan taxes worldwide assets, including US ones. Japan taxes the heir; the US taxes the estate; a treaty softens the overlap.
• Exit tax (国外転出時課税kokugai tenshutsuji kazei): leaving with ¥100M+ in financial assets after >5 of 10 years triggers tax on unrealized gains — but work/student-visa years don’t count, so it mostly hits PR/spouse holders.
• Coming off SOFA? SOFA years don’t count as Japanese tax residence, so transitioning likely resets the 5-year income clock (a fresh non-permanent-resident window) — but it gives no fresh inheritance shelter, and a spouse (Table-2) visa means worldwide-asset inheritance exposure from day one. Nuanced — confirm with a specialist.
• The sweet spot, and when it ends: a work or student visa keeps you sheltered across all three marks; taking PR or a spouse visa ends that. Plan the moves that matter — how you hold foreign investments, when you remit, big gifts, a departure or a status change — before you cross a line, with a cross-border tax professional.

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This guide is general information, not tax advice. Japan’s resident categories, the remittance and inheritance rules, the exit tax, and the US treaty mechanics are intricate, fact-specific, and periodically reformed — and the two most valuable moves here (managing the first-five-years window and any inheritance/estate planning) are exactly where the rules are hardest. Verify against the sources below and work with a cross-border tax professional before relying on any of it.