A regime built after failures
Japan’s framework is unusually informative because it was shaped directly by incidents on its own soil. The collapse of Mt. Gox and, later, the Coincheck theft, both prompted regulatory tightening rather than prohibition. The result is one of the older mandatory registration regimes for crypto exchanges anywhere.
Crypto Asset Exchange Service Providers register with the Financial Services Agency under the Payment Services Act. Requirements address segregation of customer assets from the firm’s own, cold-storage practice for the majority of customer holdings, financial soundness, and system risk management. The FSA publishes the register of providers.
Why segregation is the point
The requirement that customer assets be held separately from corporate assets is the single most consequential provision for a user. In an insolvency, commingled assets become part of the estate; segregated assets have a materially different status. Most jurisdictions arrived at this rule later, and several arrived at it only after a major failure demonstrated the alternative.
The recent DMM Bitcoin case is instructive on the limits of any regime: the company covered customer balances after a large unauthorised outflow and subsequently wound down operations and transferred accounts. Regulation shaped how the failure was handled; it did not prevent the loss.
Self-regulation
The Japan Virtual and Crypto assets Exchange Association operates as a certified self-regulatory body, issuing rules that bind its members in addition to the statutory requirements. This layered structure — statute, regulator, industry body — is characteristic of Japanese financial regulation generally.
Tax
Gains from crypto-assets have generally been treated as miscellaneous income for individuals, taxed at progressive rates rather than at a separate flat rate applied to some other financial instruments. This treatment has been the subject of sustained industry lobbying and periodic review, so the National Tax Agency’s current guidance is the source to check rather than any secondary summary.
Sources
- Financial Services Agency (Japan), Payment Services Act and crypto-asset exchange service providers (1 Jan 2026)
- National Tax Agency (Japan), Tax treatment guidance (1 Jan 2026)
Not legal or tax advice. This is a summary of published rules, not legal or tax advice. Rules change; check the primary sources linked above.
Last reviewed by Conisec Staff. Review cadence: Quarterly.