Japan Crypto Tax Guide 2026 — Miscellaneous Income (最高 55%)

Overview — How Japan Taxes Crypto

The NTA classifies cryptocurrency as "miscellaneous income" (雑所得, zasshotoku), which has significant implications:

👉 Tax Category: Crypto gains = miscellaneous income (雑所得). This is the catch-all category for income not classified as employment, business, capital gains, or other specific categories. It is combined with other miscellaneous income (pensions, freelance income) for tax calculation.

👉 Tax Rate: Progressive national income tax (5–45%) + 10% inhabitant tax (住民税) + 2.1% reconstruction surcharge on national tax = effective rate up to approximately 55% (45% × 1.021 + 10% inhabitant = ~55.945% at the top bracket).

👉 Taxable Events: Selling crypto for JPY, exchanging one crypto for another (since 2018 — this is highly controversial and punitive), spending crypto on goods or services, and receiving crypto as payment (e.g., mining, staking, airdrops).

👉 Non-Taxable Events: Transferring crypto between your own wallets, holding without selling, and receiving crypto as a gift (but the giver may trigger a taxable event at market value).

Crypto-to-Crypto Taxation — The Key Burden

The treatment of crypto-to-crypto exchanges is the most controversial aspect of Japan's crypto tax:

👉 Taxable Event: Exchanging Bitcoin for Ethereum (or any crypto for another) is a taxable disposal. You are deemed to have sold BTC at its JPY market value and used the proceeds to buy ETH. The gain is calculated as: JPY value at exchange minus JPY cost basis of the crypto sold.

👉 Example: You buy 1 BTC for JPY 5,000,000. You exchange it for ETH when BTC is JPY 10,000,000. Gain = JPY 5,000,000. This is added to your miscellaneous income and taxed at up to 55%. The ETH acquisition cost becomes JPY 10,000,000 for future disposals.

👉 Impact on Traders: Frequent traders who move between different crypto assets incur a tax liability on each exchange, even if they have not realized any cash profit. This has led many traders to adopt a "buy and hold" strategy or use only one crypto to avoid multiple taxable events.

👉 Reform Proposals: Industry groups (including the Japan Cryptocurrency Business Association) have advocated for taxing crypto at the flat 20% capital gains rate and exempting crypto-to-crypto from immediate taxation. As of 2026, no reform has been enacted, but it remains a topic of active discussion.

Cost Basis Methods — Moving Average (総平均法)

Japan requires the moving average cost method (総平均法) for calculating cost basis:

👉 Moving Average Method: Each time you acquire a crypto asset, the average cost per unit is recalculated across all units held. When you dispose of some units, the cost basis is the average cost at that time. This is similar to the average cost method used in other countries.

👉 How It Works: Buy 1 BTC at JPY 3,000,000 → average cost = JPY 3,000,000. Buy another 1 BTC at JPY 5,000,000 → new average = (3M + 5M) / 2 = JPY 4,000,000. Sell 0.5 BTC → cost basis = 0.5 × 4M = JPY 2,000,000. Remaining pool: 1.5 BTC at JPY 4,000,000 average.

👉 FIFO Not Allowed: Unlike some countries that allow specific identification or FIFO, Japan mandates the total average method. You cannot choose which specific coins to sell. All units of the same crypto are treated as a single pool.

👉 Multiple Exchange Accounts: If you hold the same crypto across multiple exchanges or wallets, the cost basis is calculated across all holdings globally. You cannot use separate pools per exchange. This makes tracking complex.

Mining, Staking, and Airdrops

Income from crypto activities is taxable at receipt:

👉 Mining: Income from crypto mining is taxed at the market value of the mined coins when received. If the mining is a hobby, it is miscellaneous income. If it is systematic and commercial, it may be classified as business income (事業所得), allowing deduction of mining costs (electricity, hardware, rent).

👉 Staking: Staking rewards are taxable as miscellaneous income at the market value when received. If rewards are automatically compounded (re-staked), each compounding event may be a taxable receipt. The NTA has not issued detailed guidance on compound staking — conservative approach: treat each reward as income.

👉 Airdrops: Airdropped tokens are taxable at market value when you gain control of them. The value is the JPY market price on the receipt date. This becomes your cost basis for future disposal. Even if you did not actively claim the airdrop, having it in your wallet likely triggers a tax liability.

👉 DeFi: Yields from DeFi protocols (liquidity mining, lending, borrowing) are taxable as miscellaneous income at receipt. The cost basis for LP tokens and the treatment of impermanent loss are not fully clarified by the NTA — conservative reporting is recommended.

Loss Rules — Very Limited Offset

Japan's treatment of crypto losses is highly restrictive:

👉 Losses Cannot Offset Salary Income: Crypto losses (miscellaneous income losses) cannot be offset against employment income (給与所得) or other categories of income. They can only be offset against other miscellaneous income within the same year.

👉 No Carry-Forward: Unlike business income losses (which can be carried forward for 3 years), crypto/miscellaneous income losses cannot be carried forward to future years. If you cannot offset the loss against other miscellaneous income in the same year, the loss is permanently lost.

👉 Practical Impact: If you have a JPY 5M crypto loss and JPY 800,000 of other miscellaneous income, you can offset JPY 800,000 of the loss. The remaining JPY 4.2M is lost forever. If you have no other miscellaneous income, the entire loss is wasted.

👉 Exception for Business Classification: If your crypto trading is classified as a business (事業所得) rather than miscellaneous income (which requires significant scale, frequency, and organization), losses can be offset against other income and carried forward. The bar for business classification is high.

Stricter Rules Since 2023

Japan has tightened crypto tax compliance and reporting in recent years:

👉 Exchange Reporting: Since 2023, licensed Japanese crypto exchanges (registered under the Payment Services Act) are required to report customer transaction data to the NTA. This includes: annual trading volumes, profit/loss summaries, and customer identification data. The NTA cross-references reported data with individual tax returns.

👉 NTA Audits: The NTA has significantly increased audits of crypto taxpayers. High-value traders, frequent exchangers, and those with unreported gains are targeted. Penalties for underreporting: 15–40% of underpaid tax (加重課税). Intentional evasion: up to 7 years imprisonment and/or fines.

👉 Travel Rule Compliance: Since June 2023, Japan implemented the FATF Travel Rule for crypto transactions. VASPs (Virtual Asset Service Providers) must collect and share originator/beneficiary information for transactions over ¥100,000. This increases traceability of crypto movements.

👉 Self-Reporting Requirements: Even if you use a foreign exchange (not registered in Japan), you must self-report all crypto transactions. The NTA can request data from foreign exchanges through bilateral agreements (e.g., US-Japan tax treaty, OECD CARF).

Reporting and Filing

Crypto gains are reported on your annual tax return (確定申告):

👉 Required If: You have crypto gains that exceed the basic deduction (JPY 480,000) or your total miscellaneous income (including crypto) exceeds JPY 200,000 in a year. Even if below these thresholds, filing is recommended to document the basis for future disposals.

👉 How to Report: Crypto gains are reported on the "Schedule for Miscellaneous Income" (雑所得の内訳書) attached to your final tax return. You must list each transaction or provide a summary with calculation method. Include: date, type of crypto, proceeds, cost basis, and gain/loss.

👉 Crypto Tax Software: Use Japanese-compatible crypto tax software (e.g., Cryptact, CoinTracker with Japan module, Gtax, Accel) that supports the total average cost method and Japanese tax forms. These tools can import transaction data from exchanges and generate the required schedules.

👉 Record-Keeping: Maintain detailed records for at least 7 years: transaction history from all exchanges, wallet addresses, cost basis calculations, fiat deposit/withdrawal records, and receipts for mining/DeFi expenses.

FAQ

How are crypto gains taxed in Japan?

Crypto gains are taxed as miscellaneous income (雑所得) at progressive rates up to ~55% effective (45% national + 10% inhabitant + reconstruction surcharge). This is much higher than the 20% capital gains rate for stocks.

Is crypto-to-crypto exchange a taxable event?

Yes. Exchanging one crypto for another is a taxable disposal. You pay tax on the gain from the crypto you sold, even though you haven't realized any cash profit. This is one of Japan's most criticized crypto tax rules.

What cost basis method does Japan require?

The total moving average method (総平均法) is mandatory for identical crypto assets. You cannot use FIFO or specific identification. All units of the same crypto across all wallets/exchanges are pooled.

Can I deduct crypto losses?

Very limited. Crypto losses (miscellaneous income) can only offset other miscellaneous income in the same year. They cannot offset salary income. Losses cannot be carried forward to future years.

Do I need to report crypto if I use a foreign exchange?

Yes. All crypto transactions must be reported regardless of where the exchange is based. The NTA can obtain data from foreign exchanges through treaty provisions and the OECD CARF framework.

What is the tax rate for mining and staking?

Mining and staking rewards are taxed as miscellaneous income at receipt (market value), at the same progressive rates (up to 55%). Mining costs may be deductible if classified as business income.

What has changed since 2023?

Stricter reporting: Japanese exchanges must report customer data to the NTA. The FATF Travel Rule applies to transactions over ¥100K. NTA audits of crypto taxpayers have increased significantly.

Is there a tax-free allowance for crypto in Japan?

Crypto gains are added to your total miscellaneous income. If your total miscellaneous income (including crypto) is under JPY 200,000, you generally do not need to file a tax return. However, the gains still count toward your basic deduction calculation.