Japan has adopted the OECD's cryptocurrency reporting framework since January 1, 2026.

PANews reported on January 6th that, according to NADA NEWS, Japan will officially implement the OECD's Crypto Asset Reporting Framework (CARF) starting January 1, 2026. This is a new mechanism aimed at allowing tax authorities worldwide to share information on crypto asset transactions. Japan decided to introduce this mechanism through tax reform, and the National Tax Agency published a promotional brochure for users and advanced preparations for collecting information through exchanges before its implementation last December.

As a result of this system's implementation, Japanese cryptocurrency exchange Coincheck sent a notice to all users on January 6th, requiring them to submit information such as their "country of tax residence." Other Japanese exchanges will also gradually implement similar information collection procedures. Existing users who opened accounts before the end of 2025 must submit their information by December 31, 2026. Users who opened new accounts after January 1st of this year must complete the declaration during their account opening process. Failure to submit the above information within the specified period, or submission of false information, may result in penalties according to law.