SEISEI INSIGHTS — Cross-border Compliance

Japan's Exit Tax: How an "Unrealized Gain You Never Sold" Becomes Taxable

2026-06-26

From wealth holders preparing to return to their home country, we hear one sentence again and again: "I'm only holding it — I haven't sold anything, so there shouldn't be any tax." If you are contemplating leaving Japan while holding listed shares carrying a large unrealized gain, that assumption may be wrong.

The first question to settle is: what is the aggregate value of the securities you hold? Once that total crosses a certain threshold, the unrealized gain becomes taxable at the moment of departure — even if you have not sold a single share. This is the structure of the exit tax (kokugai tenshutsu-ji kazei).

No Sale, Yet "Deemed to Have Been Transferred"

The exit tax rests on Article 60-2 of the Income Tax Act (special provision for capital gains where a taxpayer departs from Japan). It provides that where a qualifying resident holds securities at the time of departure, those securities are deemed to have been transferred as of that moment.

In other words, without any actual sale, the act of leaving is treated as a disposal, and the difference between market value and acquisition cost at that point — the unrealized gain — is taxed. The rate is the same as for capital gains: 15.315% (15% income tax plus the 0.315% Special Reconstruction Income Tax).

Who It Applies To — Two Requirements

Not every departing taxpayer is caught. Article 60-2 applies to residents who meet both of the following.

Requirement	Content
Asset size	Securities held at the time of departure total ¥100 million or more (it does not apply below ¥100 million)
Residence period	Within the 10 years before departure, periods of domicile or residence in Japan total more than 5 years (it does not apply at 5 years or less)

The "securities" in scope include not only shares and investment trusts but also open margin transactions and derivative positions. Most long-term residents already satisfy the residence-period requirement.

Deferral of Payment — You Need Not Pay in Full at Departure

Because the tax falls on an unrealized gain at a moment that brings no cash in, a funding problem arises. Article 137-2 of the Income Tax Act addresses this with a payment-deferral mechanism.

By completing the prescribed procedures — including appointing a tax agent — and posting collateral, payment can be deferred for up to 5 years, extendable to 10 years through further procedure. While deferral applies, a continuation report must be filed each year.

What matters is what happens next. If you return to Japan during the deferral period and still hold the securities without having sold them, the tax itself can be cancelled. If, however, you sell them abroad during that period, the deferred tax becomes payable.

Treating It as a Structural Question

The exit tax is not something to scramble over in the final days before departure. The testing date is the moment of departure, and the holding structure at that instant decides the outcome. In general terms, the structural questions are:

Where the market value of your securities sits relative to the ¥100 million testing threshold
The treatment of listed shares held in a NISA account (the tax-exempt account under Article 37-14 of the Act on Special Measures Concerning Taxation)
Whether securities are held in an individual's or a company's name

China, too, has a mechanism requiring a tax settlement before departure in connection with emigration and deregistration of household registration. The thresholds and procedures differ from Japan's, but the direction — fixing the tax position at the point of crossing a border — is shared.

A Sense of Scale, by Illustration

Purely as a general illustration, the scale of the mechanism:

Item	Amount (example)
Aggregate market value of securities	¥120 million
Aggregate acquisition cost	¥40 million
Unrealized gain	¥80 million
Rate	15.315%
Tax on the deemed transfer	approx. ¥12.25 million

Departure is not the end of your tax relationship with Japan; it can be the very point at which that relationship is fixed. Mapping your residence period, the composition of your holdings, and the names in which they are held onto a single diagram is the starting point before you cross a border.

This article provides general information on tax systems and does not constitute individual tax consultation. Specific filings and tax computations are handled by licensed partner tax accountants whom we introduce.

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