Current rates
Miscellaneous income is taxed at national rates of 5% to 45%, plus 10% local inhabitant tax. Crypto losses cannot offset salary or other income and cannot be carried forward.
What is taxable
Selling for yen, swapping one crypto for another and paying with crypto are taxable. Employees with a single salary source do not need to file if their total other income, including crypto gains, is ¥200,000 or less, though local tax may still apply.
Staking, mining and airdrops
Staking rewards and mining income are taxed as miscellaneous income at their value when received. Airdrops are usually taxed when they are sold or used, if they had no value on receipt.
Planned reform
The government and the Financial Services Agency are preparing to treat crypto more like securities, with a separate flat rate of 20% for gains on designated crypto assets. Until a reform takes effect, the current rules apply; watch for the start date.