How Is Crypto Taxed in Japan Right Now?

Japan taxes cryptocurrency gains as miscellaneous income (雑所得, zasshotoku) under the Income Tax Act. This means crypto profits are added to your total income and taxed at progressive rates reaching up to 55% — a combination of 45% national income tax plus 10% resident tax. Japan does not currently treat crypto as capital gains. The tax year runs from January 1 to December 31, and annual tax returns (確定申告, kakutei shinkoku) must be filed between February 16 and March 15 of the following year.

Japan's Progressive Tax Rates for Crypto Income

Because crypto gains fall under miscellaneous income, they are subject to Japan's progressive income tax brackets. When combined with the flat 10% resident tax (住民税, juminzei), the effective rates are:

Taxable Income (JPY)	Income Tax Rate	With Resident Tax
Up to ¥1,950,000	5%	15%
¥1,950,001 – ¥3,300,000	10%	20%
¥3,300,001 – ¥6,950,000	20%	30%
¥6,950,001 – ¥9,000,000	23%	33%
¥9,000,001 – ¥18,000,000	33%	43%
¥18,000,001 – ¥40,000,000	40%	50%
Over ¥40,000,000	45%	55%

This structure means that a high-earning trader with ¥50,000,000 in crypto gains would face the maximum 55% rate on the portion above ¥40,000,000. By contrast, traditional stock and securities gains are taxed at a flat 20.315%. This disparity has been the central grievance of the Japanese crypto community for years and the primary driver behind the separate taxation reform movement.

Cost Basis Methods: Only Two Options

Japan permits exactly two cost basis calculation methods for cryptocurrency, both governed by National Tax Agency (NTA) guidelines. Neither FIFO, LIFO, HIFO, nor Specific Identification — methods commonly used in the United States — are available in Japan.

Total Average Method (総平均法, Soheikinho) — Default

The Total Average Method is the NTA's default calculation. Under this method, you determine your cost basis by dividing the total acquisition cost of all units of a given crypto asset acquired during the year (plus opening inventory) by the total number of units held. The formula is:

Unit Cost = (Opening Inventory Value + Total Purchases During Year) ÷ (Opening Inventory Units + Total Units Purchased During Year)

A key limitation of this method is that you cannot determine your cost basis until December 31, because the calculation depends on all purchases made throughout the entire year. Every purchase in December changes the per-unit cost for disposals that occurred in January.

Moving Average Method (移動平均法, Idoheikinho) — Elective

The Moving Average Method recalculates your average cost basis after each individual purchase. This provides a real-time cost basis that can be determined at the time of each disposal. However, opting into this method requires filing a notification (届出書) with your local tax office, and once selected, you are locked into this method for a minimum of three years before you can switch back.

The Moving Average Method is generally preferred by active traders because it allows them to know their exact cost basis at any point during the year, rather than waiting until year-end.

The ¥200,000 Exemption Rule

Salaried employees (給与所得者) whose miscellaneous income totals ¥200,000 or less per year are exempt from filing an income tax return. This exemption is significant for casual investors with small gains. However, there are two critical caveats:

This exemption applies only to national income tax. You are still required to file a resident tax return (住民税の申告) with your municipal office, regardless of the amount.
The exemption applies to total miscellaneous income, not just crypto. If you have other miscellaneous income sources (freelance work, foreign currency gains, etc.), they are combined with your crypto gains for this threshold.

NTA Filing Tools and Record-Keeping

The NTA provides dedicated Excel calculation sheets (暗号資産の計算書) specifically designed for computing crypto gains. These spreadsheets implement both the Total Average and Moving Average methods and are updated annually on the NTA website.

Taxpayers must maintain records of every acquisition and disposal, including the date, quantity, price in JPY at the time of the transaction, the counterparty exchange, and the transaction type (purchase, sale, swap, payment for goods/services). The NTA has stated that crypto-to-crypto trades are taxable events, as are using crypto to purchase goods or services.

Japanese domestic exchanges are required to issue annual transaction reports (年間取引報告書) to customers by January 31. Since January 1, 2026, under CARF (Crypto-Asset Reporting Framework), Japanese exchanges also report customer transaction data directly to the NTA, which is then shared with other participating tax authorities worldwide.

The Separate Taxation Reform: 55% to 20.315%

The most significant development in Japanese crypto taxation is the ongoing legislative push to reclassify crypto assets from miscellaneous income to a separate taxation category (申告分離課税, shinkoku bunri kazei) at a flat 20.315% rate.

Reform Timeline

The reform has been building through concrete institutional milestones:

December 10, 2025: The Financial Services Agency (FSA) Working Group published its final report, formally recommending that crypto assets be reclassified from a "payment instrument" to a "financial product" under the Financial Instruments and Exchange Act (FIEA, 金融商品取引法, or 金商法 for short).
December 19, 2025: The Liberal Democratic Party (LDP) tax reform outline for FY2026 confirmed the direction toward separate taxation, acknowledging that the current progressive rates create an excessive burden relative to other financial instruments.
January 1, 2026: CARF takes effect in Japan, with exchanges beginning to report detailed transaction data to the NTA — a prerequisite infrastructure for any relaxed tax treatment.
2026 Diet session (expected): The FSA is expected to submit the FIEA amendment bill to the National Diet for deliberation.
2027 (expected): FIEA amendment enacted, with a one-year preparation period for exchanges, tax systems, and regulatory infrastructure.
January 1, 2028 (expected): Separate taxation at 20.315% takes effect for eligible crypto assets.

What 20.315% Means

The proposed flat rate of 20.315% mirrors the existing taxation of listed stocks and securities in Japan. It breaks down as:

15% national income tax
0.315% reconstruction special income tax (復興特別所得税, levied through 2037 for Tohoku earthquake recovery)
5% resident tax

Loss Carryforward: A Major Change

Under the current miscellaneous income classification, crypto losses cannot be carried forward or offset against other income categories. If you lose ¥10,000,000 trading crypto in one year and gain ¥10,000,000 the next, you pay tax on the full gain with no relief for the prior loss.

The separate taxation reform would introduce a three-year loss carryforward provision (繰越控除, kurikoshi kojo), aligning crypto with how stock trading losses are treated. This change alone could significantly reduce the effective tax burden for active traders who experience volatile year-to-year results.

Critical Limitation: Only "Specified Crypto Assets"

The separate taxation rate would apply only to 特定暗号資産 (tokutei ango shisan) — specified crypto assets that are registered with licensed financial services operators (暗号資産交換業者) in Japan. As of early 2026, approximately 105 crypto assets qualify across all registered exchanges.

The following income types would not be covered by the 20.315% rate and would remain taxable as miscellaneous income at progressive rates up to 55%:

Staking rewards
Lending/DeFi yield
NFT transactions
Airdrops and hard fork proceeds
Gains from assets not listed on registered exchanges

This distinction is critical for DeFi users and NFT collectors, who would see no tax reduction under the current reform proposal.

Stablecoins and the JPYSC Initiative

Japan's stablecoin landscape is evolving rapidly. SBI Holdings and Startale Labs are developing JPYSC, a yen-denominated stablecoin designed to comply with the 2023 revised Payment Services Act. Three mega banks — Mizuho, MUFG (Mitsubishi UFJ), and SMBC (Sumitomo Mitsui) — have received approval to begin stablecoin pilot programs.

From a tax perspective, yen-denominated stablecoin transactions that do not result in a gain or loss (e.g., converting JPY to a 1:1 stablecoin) are generally not taxable events. However, any yield earned on stablecoins through lending or DeFi protocols remains miscellaneous income.

Bitcoin ETFs: Not Yet, But Coming

Japan does not currently permit spot Bitcoin ETFs. The existing regulatory framework classifies crypto as a payment instrument rather than a financial product, which prevents investment trust structures from holding crypto assets directly.

The FIEA reclassification — the same legislative change driving the separate taxation reform — is a prerequisite for Bitcoin ETF approval. If the FIEA amendment passes as expected, the earliest Bitcoin ETF approvals in Japan would likely come in 2028, following the required regulatory preparation period. Finance Minister Katayama has declared 2026 as Japan's "Digital Year" (デジタル元年), signaling strong governmental support for crypto market infrastructure development.

Japanese Market: Competitors and Tools

The Japanese crypto tax software market is dominated by two players:

Cryptact (クリプタクト): The market leader, supporting over 100 exchanges and offering both the Total Average and Moving Average methods with automated calculations.
Gtax: A strong competitor with deep integration into Japanese domestic exchanges and NTA-compliant reporting formats.

Both tools focus on generating the NTA's required calculation sheets and supporting the Japanese-specific cost basis methods. dTax provides international coverage with multi-jurisdiction support, which is particularly valuable for Japanese taxpayers who trade on overseas exchanges or hold assets across multiple countries — a scenario that becomes increasingly relevant as CARF-driven cross-border reporting begins in 2026.

Frequently Asked Questions

Do I need to file a tax return if my crypto gains are small?

If you are a salaried employee and your total miscellaneous income (including crypto) is ¥200,000 or less for the year, you are exempt from filing a national income tax return. However, you must still file a resident tax return with your local municipal office. If you are self-employed or have other filing obligations, all crypto gains must be reported regardless of amount.

When will the 20.315% separate taxation rate take effect?

Based on the current legislative timeline, the separate taxation rate is expected to take effect on January 1, 2028. This depends on the FIEA amendment bill passing during the 2026 Diet session and the subsequent one-year preparation period. The reform applies only to specified crypto assets listed on registered Japanese exchanges — staking, lending, DeFi yields, NFTs, and airdrops would remain taxed as miscellaneous income at rates up to 55%.

Can I use FIFO or Specific Identification in Japan?

No. Japan permits only two cost basis methods: the Total Average Method (総平均法, the default) and the Moving Average Method (移動平均法, which requires filing a notification and locks you in for three years). FIFO, LIFO, HIFO, and Specific Identification are not recognized by the NTA. If you hold crypto in multiple jurisdictions, be aware that your Japanese tax obligations require using one of these two methods regardless of what methods you use for other countries' tax filings.

Key Takeaways

Current rates are steep: Crypto gains are taxed as miscellaneous income at progressive rates up to 55%, with no loss carryforward.
Only two cost basis methods exist: Total Average (default) and Moving Average (elective, 3-year lock-in). No FIFO, LIFO, or HIFO.
Reform is real but not immediate: The 20.315% separate taxation rate is expected by January 1, 2028, contingent on FIEA amendment passage.
DeFi users will not benefit from reform: Staking, lending, airdrops, and NFTs remain miscellaneous income even after reform.
CARF is live: As of January 1, 2026, Japanese exchanges report to the NTA, which shares data internationally.
File on time: The deadline is March 15 annually. The NTA provides Excel tools, and third-party software like dTax can help automate calculations across multiple exchanges and jurisdictions.