Japan
CoinPost
National Tax Agency's New System 'KSK2' Goes Live, Using AI Analysis to Detect Unreported Crypto Income
- KSK2 fully launched September 24, 2026, integrating individual and corporate tax data under My Number and corporate number for the first time in about 25 years
- AI cross-checks crypto exchanges' annual transaction reports, bank transfer histories, CRS data from overseas authorities, and even social media posts (e.g. claims of crypto profits) against tax filings to flag underreporting risk
- System also merges personal and corporate records, making inconsistencies easier to spot for investors using private companies or funds from gifts/inheritance to buy crypto, while the transition has caused delays in tax certificate issuance at some tax offices