Independent advisory practice specializing in international taxation and crypto asset taxation, led by a former insider with 30 years in Japan's tax administration.
I spent 30 years inside Japan's tax administration — and I now advise foreign businesses on the rules I helped shape.
My career spans a local tax office, the Ministry of Finance (Tax Bureau) — where I spent a decade each in personal income tax policy and international tax policy — and the National Tax Agency.
When Japan's crypto industry needed a regulatory framework, I was appointed Secretary General of the Japan Virtual and Crypto Assets Exchange Association (JVCEA), the self-regulatory body authorized by the Financial Services Agency. I served in that role and later as Senior Advisor for approximately five years.
Today I lead Yasukochi International Tax Advisory, an independent practice based in Chiyoda-ku, Tokyo.
Advisory on Japanese tax implications of holding, trading, issuing, and accepting crypto assets — including the mark-to-market regime, consumption tax treatment, and recent reforms.
Tax-efficient structuring for foreign businesses entering the Japanese market, including permanent establishment analysis, withholding tax planning, and entity selection.
Review of applicable tax treaties, treaty benefit eligibility including limitation on benefits provisions, and preparation support for treaty application procedures.
Guidance on the intersection of Japan's regulatory framework and tax obligations for Web3 projects, token issuers, and digital asset businesses.
The first English-language guide to Japan's crypto tax rules written by a former insider. Covers corporate tax (including mark-to-market), consumption tax, withholding, treaty relief, permanent establishment risk, and practical scenarios — built for CFOs, tax directors, and founders.
For consultation on your specific tax situation, please reach out via email with a brief description of your business and the issues you are facing. Initial inquiries are welcome in English or Japanese.