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Domestic crypto-asset taxation detail — miscellaneous income vs separate self-assessment + individual vs corporate

Confidence: Likely Updated 2026-05-19 Review by 2026-08-08 Sources 2 Machine-translated Original (JA)
#exchanges#taxation#jp-vasp#regulation#retail
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This entry sits under exchanges index. Read it against FSA crypto-asset exchange registration system — number system / Local Finance Bureau jurisdiction / registration requirements for peer / contrast context and Japan Financial Regulation — Legal Framework for Tokens, Crypto Assets, and Payments for the broader system / regulatory boundary.

1. Overview

Domestically, crypto assets are taxed as “miscellaneous income”（雑所得）under the Income Tax Act（2017- the National Tax Agency developed a Q&A in step with the Virtual Currency Act’s enforcement）. Individuals face a progressive rate up to 55%（45% income tax + 10% resident tax）. By contrast, equities / FX / crypto-asset ETFs（via the US）are taxed under separate self-assessment at 20%（15% income tax + 5% resident tax）— a 35 percentage-point gap that is the single biggest factor distorting retail investors’ holding / trading behavior. Even among major OECD countries, the rate is conspicuously heavy.

2. Individual taxation detail

  • Miscellaneous-income progression: taxable income above 4M JPY at 33%; 9M at 40%; 18M at 45%（+ resident tax 10% = up to 55%）
  • No loss offsetting: offsetting against other miscellaneous income is allowed, but not against employment income / business income / equity-transfer gains
  • No loss carryforward: losses cannot be carried forward to subsequent years（equities can be carried forward 3 years — a large asymmetry）
  • Transfer/exchange taxation: a BTC → ETH swap is also a taxable event（fiat conversion at each point in time is required, and tracking the acquisition cost is cumbersome）
  • Use taxation: purchasing goods / services with crypto assets is also a taxable event（an impediment to the development of Lightning payments, etc.）

3. Corporate taxation

  • Corporation tax 23.2%（effective rate ~30%）
  • Year-end fair-value measurement obligation（eased under the 2024 revision）: previously, held tokens had to be measured at year-end fair value with unrealized gains taxed. Under the 2024 revision, fair-value measurement is exempted if the entity declares “holding purpose = long-term holding, not for trading”
  • Loss offsetting allowed: offsetting against other business income
  • A 25 percentage-point gap between corporate vs individual + the possibility of offsetting + loss carryforward = a large incorporation advantage（a surge in HNW investors establishing godo-kaisha / LLC-type companies）

4. Impact on investor behavior

  • HODL strategy: the cost of realized gains from short-term trading is excessive → a bias toward long-term hodl（a structural factor behind sluggish trading volume）
  • Incorporation: incorporation by high-net-worth investors（godo-kaisha / asset-management companies）
  • Indirect exposure via US ETFs（IBIT/FBTC）: US ETFs are under separate self-assessment at 20% + a three-year carryforward — more favorable than domestic spot → accelerating outflow via US ETFs btc-spot-etf-japan-impact
  • Emigration abroad（Singapore/UAE/Portugal）: a wealthy-class outflow problem — there is also an increase in exit-tax handling such as the 5 -year residency requirement

5. 2026 revision trends

  • **As of 2026 ** industry bodies（JBA / jvcea-self-regulatory-overview + the LDP Financial Research Commission）are proposing a move to separate self-assessment at 20%
  • The 2027 revision draft envisages separate self-assessment for major tokens such as BTC/ETH（undetermined; the Ministry of Finance is cautious）
  • Some lawmakers advocate complete abolition（the same treatment as equities）— linked to Web3 policy proposals
  • If the revision is realized ⇒ a surge in retail trading volume + a shrinking of the incorporation advantage + a shift in ETF/spot preference

Sources

National Tax Agency（NTA）notices + the Q&A on the tax treatment of virtual currencies, Income Tax Act statutes, JBA / JVCEA proposal public materials, Nikkei/ITmedia explanatory articles.