CRS and the Overseas Assets Report: Why "Japan Can't See My Home-Country Accounts" Is a Myth

"The assets in my home-country bank are invisible to the Japanese tax authority." We hear this constantly from foreign-national wealth holders in Japan. They hold tens of millions of yen in deposits or investments back home, have never filed anything in Japan, and assume Japan simply cannot see it. That assumption no longer holds.

The Information Arrives Before You File: CRS

The Common Reporting Standard (CRS) is the OECD-led framework for the automatic exchange of financial account information. More than a hundred jurisdictions participate, and exchange between Japan and China has been in effect since 2018.

The mechanism is straightforward. A financial institution in one country identifies an account holder's tax residence through KYC checks at account opening; if the holder is a tax resident of another country, the institution reports the account to its own tax authority, which then forwards the data automatically to the authority in the country of residence. The balances, interest, and dividends on a Japanese resident's home-country accounts reach Japan's National Tax Agency without any action on the holder's part.

Even where an account was opened "with a different identity document" or "without a Japanese address," institutions use multiple indicators to determine tax residence. The structure by which the information arrives does not change.

The Duty to Disclose: The Overseas Assets Report

Separately from CRS, Japan requires residents to disclose their own overseas assets. A resident (excluding non-permanent residents) holding overseas assets exceeding ¥50 million in aggregate value as of December 31 must file an Overseas Assets Report — stating the type, quantity, value, and location of each asset — with the competent tax office by June 30 of the following year (Act on Submission of Reports concerning Overseas Wire Transfers, Art. 5).

The report is not limited to deposits.

If You Do Not File: Penalties and Surtax

Filing a report with false statements, or failing without justifiable grounds to file by the deadline, carries imprisonment of up to one year or a fine of up to ¥500,000 (Art. 10).

There is also an adjustment to under-reporting penalties. If the report was properly filed, any later-discovered under-reporting attracts a reduced penalty; if it was not filed, the penalty is increased (Art. 6). Whether you filed becomes a cost in its own right, separate from the underlying tax. In recent years, the treatment of this report also bears on inheritance-tax situations.

Treat It as a Structural Question

In our experience, most problems arise not from concealment but from not knowing a disclosure obligation already existed. Three things to confirm:

• Are you in the residency category that bears the reporting obligation? It turns on whether you are a non-permanent resident.
• Do your overseas assets exceed ¥50 million in aggregate? That determines whether the report is required.
• Does the information arriving via CRS match what you have filed? A mismatch is what triggers an inquiry.

Mapping the location, valuation, and filing status of your overseas assets onto a single structural diagram is the starting point for anyone holding cross-border assets.

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.