Crypto Taxation in Japan

How does Japan classify cryptocurrency gains for tax purposes?

The National Tax Agency (NTA) classifies individual cryptocurrency gains as miscellaneous income (zatsu shotoku, Article 35 of the Income Tax Act) rather than as capital gains or business income. This classification has operated since NTA guidance issued in 2017 and updated through 2023 (FAQ Version 8, December 2023). Under this framework, gains from disposing of crypto assets are aggregated with any other miscellaneous income and taxed at Japan's national progressive rates, ranging from 5% on taxable income up to 1,950,000 yen to 45% on income exceeding 40,000,000 yen. A flat 10% local inhabitant tax (prefectural 4% plus municipal 6%) and a 2.1% special reconstruction income surtax apply on top of the national rate, producing a combined effective top marginal rate of approximately 55.945% (source: PwC Worldwide Tax Summaries, Japan, accessed June 2026; NTA FAQ Version 8, December 2023).

National income tax brackets and combined rates

The table below shows Japan's national income tax brackets alongside the approximate combined rate once local inhabitant tax and reconstruction surtax are added.

Combined rate = national rate + 2.1% reconstruction surtax on national tax + 10% local inhabitant tax. Source: PwC Worldwide Tax Summaries, Japan individual taxes on personal income, accessed June 2026.

Which events trigger a taxable disposal?

The NTA FAQ Version 8 (December 2023) identifies the following as taxable events: selling cryptocurrency for Japanese yen or other fiat currency; spending cryptocurrency to purchase goods or services (the yen fair-market value at the moment of the purchase determines the disposal proceeds); swapping one cryptocurrency for another (a Bitcoin-to-Ether trade is treated as a taxable disposal of Bitcoin, with the yen value of the Ether received as proceeds); receiving mining or staking rewards (taxed as miscellaneous income at yen fair-market value at receipt, which also becomes the cost basis for any subsequent disposal); and receiving airdrops where a determinable fair-market value exists at receipt. Transfers between an individual's own wallets do not constitute a taxable event. Cost basis is calculated using the total-average method by default, with the moving-average method available on election (NTA FAQ Version 8, source: NTA FAQ index, nta.go.jp).

How does the JPY 200,000 filing threshold work?

Salaried employees whose total miscellaneous income for the year -- including all cryptocurrency gains -- falls below 200,000 yen are not required to file a national income tax return (kakutei shinkoku), provided they have no other reason requiring a return (for example, a salary exceeding 20,000,000 yen or certain deduction claims). This exemption applies to the national income tax return only. Local inhabitant tax must still be reported to the individual's municipality regardless of the 200,000 yen threshold; failure to report locally is non-compliant even when no national return is required. Self-employed individuals and those already required to file for other reasons cannot use the 200,000 yen exemption -- their full miscellaneous income, including crypto gains of any amount, must be reported.

What is the status of the 20% flat-rate reform?

On December 19, 2025, Japan's ruling coalition published the fiscal year 2026 Tax Reform Outline, proposing to reclassify qualifying crypto assets as financial products under the Financial Instruments and Exchange Act. The proposal would apply a flat 20% separate self-assessment tax (15% national income tax plus 5% individual inhabitant tax) to spot trading, derivative trading, and ETF gains on specified crypto assets handled by registered exchanges -- broadly expected to cover Bitcoin, Ether, and approximately 105 assets listed on registered Japanese platforms. A three-year loss carryforward would also be introduced. As of June 2026 the proposal remains an outline subject to Diet deliberation; it has not been enacted into law. Full implementation for individual filers is projected no earlier than January 1, 2028, pending coordinated amendments to the Financial Instruments and Exchange Act. Staking rewards, lending yields, and NFTs are not covered by the proposal and would remain taxable as miscellaneous income at progressive rates under the current framework (source: EY Japan Tax Alert, December 2026 Reform Outline, December 2025).

For context on Japan's broader personal income framework, see the Japan country overview and the connected Japan capital gains tax page, which covers the existing 20.315% flat rate that applies to listed securities -- the same rate the crypto reform proposes to adopt.

Cryptocurrency taxation rules in Japan are subject to legislative change. The information above reflects the framework as of June 2026 and the December 2025 reform outline. Individual circumstances vary significantly -- consult a certified tax accountant (zeirishi) registered with the Japan Federation of Certified Public Tax Accountants' Associations before making any filing, disposal, or structuring decision.