What CRS Actually Reports — and What It Does Not

"I opened that account in Japan. How would my home-country tax authority ever know about it?" We hear this question constantly from clients with cross-border assets. Behind it usually sits an assumption: that information travels only if the taxpayer volunteers it. The automatic exchange of financial account information under the Common Reporting Standard (CRS) was designed precisely to displace that assumption. What follows is not an argument about the policy, but a map of the order in which information actually moves under Japanese law.

The Chain Begins with the Institution, Not the Taxpayer

Japan implements CRS through the Act on Special Provisions of the Income Tax Act, the Corporation Tax Act and the Local Tax Act Incidental to the Enforcement of Tax Treaties (the "Enforcement Act").

A person entering into a specified transaction with a financial institution must submit a notification stating their name, address, country of residence, and other prescribed particulars to the head of the reporting financial institution's business office at the time of that transaction — and the institution, in turn, is obliged to verify what the notification states (Enforcement Act, Art. 10-5(1)). The determination of residence is therefore not left to self-declaration alone. That is the hinge on which the whole framework turns.

One Report a Year, from the Institution to the Tax Office

Where a reporting financial institution holds a reportable contract as of December 31, it must provide the prescribed reporting items to the competent District Director of the Tax Office by April 30 of the following year (Enforcement Act, Art. 10-6(1)). A reportable contract is, broadly, one held by a person whose determined country of residence is a reportable jurisdiction.

The point worth absorbing is that this reporting happens automatically, every year, regardless of anything the account holder does or does not do. The information gathered by each country's tax authority is then provided to the counterpart authority as tax treaties and equivalent agreements provide. Exchange between Japan and China has been in effect since 2018, and China has likewise established due-diligence and reporting rules for the tax information of non-resident financial accounts — making the channel a two-way one.

What Is Reported, and What Is Not

The Enforcement Act sets out the reporting items as follows.

Here is where confusion most often sets in: "not a CRS reporting item" and "not subject to disclosure in Japan" are entirely different propositions. Real property abroad, for instance, is not a CRS reporting item — yet it must be listed on the Overseas Assets Report (Act on Submission of Reports concerning Overseas Wire Transfers, Art. 5). Each regime captures a different perimeter, so no disclosure obligation can be ruled out merely because an asset falls outside CRS.

Where Crypto Assets Sit

Crypto assets were long understood to lie outside the financial-account exchange framework. The Enforcement Act, however, now contains a mechanism under which reporting crypto-asset exchange service providers furnish reporting items on crypto-asset transactions, bringing that territory inside the information-reporting perimeter. Building an asset structure on the premise that "it isn't a bank account, so it won't be seen" no longer holds.

Treat It as a Structural Question

CRS is not an enforcement instrument aimed at taxpayers. It is a mechanism by which jurisdictions confirm to one another that income which ought to be taxed has been declared where it ought to be declared. In our experience, most problems arise not from any intent to conceal, but from the simple absence of awareness that the information has already arrived. Three things to confirm:

• Does the country of residence you notified to each financial institution match where your life and business actually are today?
• Have the same assets and the same income been reported consistently on both the Japanese and the home-country side?
• Do you retain records that explain the origin of the funds — remittance records, sale and purchase agreements, tax payment certificates?

What you told your banks, what you filed in each country, and where the money came from: aligning these three on a single structural diagram is the starting point for anyone holding assets across borders. Relief from double taxation under a tax treaty, too, only functions where both sides have been properly declared.

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.