According to the Tokentax review (16), the maximum PIT rate for crypto income in Japan is 55%. This tax rate is applied also for any crypto capital gains. In some cases, earnings under 200k JPY are tax-free. 45% - CGT and 10% local tax for inhabitants. Moreover, there is no exemption for long-term holders.
The Japanese National Tax Association (NTA) views crypto as property and taxes it as miscellaneous income under the Payment Services Act (PSA) and the Financial Instruments and Exchange Act (FIEA). Japanese taxpayers are not taxed when they purchase, hold, or move crypto between wallets. However, if you’ve purchased or sold crypto and made more than 200k JPY, you must declare your crypto gains on your income tax return.
This includes permanent residents’ profits from cryptocurrency trading, Bitcoin mining, and DeFi lending. Considering that Japan taxes stock profits at a flat 20%, its crypto tax rates are very high.
You can find more details about the general taxation procedure in the local tax authority guide (17).