Cryptocurrency Taxes in Japan: Reporting Your Bitcoin & Crypto Gains
If you trade or invest in Bitcoin and other cryptocurrencies while living in Japan, you need to understand how crypto tax works. This guide explains how Japan taxes crypto in 2025, which transactions are taxable, how to report your gains, and what reforms are coming.
Crypto tax in Japan: quick overview
Here is the big picture for individual investors as of late 2025:
- Crypto is treated as “property” and taxed as income, not as a currency.
- For individuals, crypto profits are classified as “miscellaneous income” (zatsu shotoku) under the Income Tax Act, not as capital gains.
- Miscellaneous income is added to your other income and taxed at progressive rates of 5–45% national tax plus about 10% local tax, so the total top rate can be around 55%.
- If your non-salary income (including crypto) is more than ¥200,000 in a year, you usually need to file a final income tax return (kakutei shinkoku).
At the same time, Japan is planning a major reform:
- The Financial Services Agency (FSA) and ruling party have proposed changing crypto tax to a flat 20% “separate tax” (similar to stocks) and reclassifying many crypto assets as financial products.
- The goal is to implement this around fiscal year 2026, but as of November 2025 the law is not yet in force.
So for your 2025 tax returns, you still need to follow the current miscellaneous income / up to 55% rules.
If you want a broader picture of income tax in Japan, you can also check our guide on taxes in Japan for expats made simple.
How Japan classifies cryptocurrency for tax
Japan’s crypto rules come from a mix of tax law and financial regulation:
- Under the Payment Services Act and Financial Instruments and Exchange Act (FIEA), crypto assets are treated as a type of property/asset, not legal tender.
- The National Tax Agency (NTA) clarified in December 2017 that gains on virtual currency for individuals are “miscellaneous income” unless they clearly fall into another category (for example, business income for professional traders).
This classification has big consequences:
- You cannot use the simple 20.315% separate tax rate that applies to stock and ETF gains (at least, not yet).
- Losses from crypto normally cannot offset salary income, and in most cases cannot be carried forward to future years; they can usually only offset other income in the same miscellaneous category and same year.
For long-term planning, this means crypto should fit into your wider retirement and investment plan, not replace it. For that bigger picture, see Financial planning for expats in Japan: saving and investing for retirement.
When do you pay tax on crypto in Japan?
You do not pay tax just for buying and holding crypto. Instead, tax is triggered when you realize a profit or receive income.
According to NTA guidance (summarised by Japanese tax firms and major crypto tax guides), you have a taxable event when you:
- Sell crypto for yen or another fiat currency
- Swap one crypto for another (BTC → ETH, ETH → USDT, etc.)
- Use crypto to buy goods or services
- Receive crypto as payment for work or freelancing
- Receive crypto from mining, staking, liquidity provision, DeFi interest, yield farming or lending
- Receive crypto via airdrops, referral rewards, or bonuses
By contrast, you usually do not trigger tax when you:
- Buy crypto with yen and just hold it
- Transfer your own coins between your wallets or exchanges
- Move coins from a Japanese exchange to a hardware wallet you own
Taxable vs non-taxable crypto events
| Action | Taxable in Japan? | Notes |
|---|---|---|
| Buying BTC with yen and holding | No | No tax until you dispose of it. |
| Moving BTC from Exchange A to your hardware wallet | No | Still your asset, just a transfer. |
| Selling BTC for yen | Yes | Gain = sale value – cost basis, in yen. |
| Swapping BTC for ETH | Yes | Treated as if you sold BTC for yen, then bought ETH. |
| Paying for a hotel or gadget with crypto | Yes | Gain calculated using yen market price at time of payment. |
| Receiving crypto salary or freelance payment | Yes | Income at fair market value in yen on receipt date. |
| Mining, staking, yield farming, lending rewards | Yes | Income at yen value when you receive the rewards. |
| Airdrops, referral bonuses, “play-to-earn” rewards | Yes | Taxable miscellaneous income on receipt. |
*(based on NTA’s 2017 guidance and updated English-language summaries) *
If you are receiving crypto in return for your work, you should also read our guide on working as a freelancer in Japan while getting paid overseas.
Crypto tax rates in Japan for individuals
Progressive rates up to about 55%
As of 2025, crypto gains and rewards are taxed as miscellaneous income at progressive rates:
- National income tax: 5% to 45%
- Local inhabitant tax: flat 10% (combined prefectural + municipal)
So the maximum marginal rate is roughly 55% for high-income earners.
In practice, your crypto profits are added to your other income (salary, business income, etc.) and taxed together after deductions.
Example: simple salary earner with crypto gains
Imagine you:
- Work as an employee in Tokyo
- Earn ¥7,000,000 salary (with normal company withholding)
- Make ¥600,000 net profit from crypto trading in the year
That ¥600,000 crypto profit is:
- Miscellaneous income
- Added on top of your other income and taxed at your marginal rate
- For many people at this total income level, the combined national + local rate on this extra ¥600,000 will be roughly in the 20–33%+ range (exact rate depends on deductions and brackets for that year).
If your total income is high enough, part of your crypto profits could be taxed at the top rate.
For long-term investing, this is one reason many expats also use NISA and iDeCo for stocks and funds, where gains can be tax-free or tax favoured.
The ¥200,000 rule and who must file a tax return
Japan has a small-income threshold that is often misunderstood:
- If you are a salaried worker with income from one employer and full year-round withholding, you do not need to file a return if your other income (excluding salary and retirement) is ¥200,000 or less.
For crypto, this usually means:
- If your total net crypto profits plus other side income are within ¥200,000, you may not need to file (assuming your only other income is salary with proper withholding).
- If your crypto + other non-salary income exceeds ¥200,000, you normally must file a return.
Be careful with this rule:
- It is a filing exemption, not a “tax-free band” for everyone.
- If you are self-employed, have multiple employers, or fall into other special cases, you may need to file even with lower amounts.
For a step-by-step explanation of returns, see How to file your final income tax return in Japan on our site.
How to calculate your crypto gains in yen
Converting foreign-currency trades into yen
Many Japan-based expats trade mostly in USD- or USDT-quoted markets on global exchanges. The NTA says that when you calculate income for tax purposes, you must convert each transaction into yen using an appropriate rate (for example, the middle TTM rate on the transaction date).
In practice:
- Choose a reliable FX source (for example, your bank’s TTM rate or a recognised FX provider).
- For each taxable event, record the yen value at the time of the transaction, not just the crypto amount.
Some crypto tax tools used in Japan can do this automatically using daily rates.
Cost basis methods
NTA guidance (via Japanese tax firms) generally assumes you use an overall average method (総平均法) or similar to calculate cost basis for miscellaneous income from crypto:
- Track total yen cost of your holdings and total quantities.
- Each time you sell or swap, calculate an average cost per unit.
Whatever method you use, be consistent and keep documentation to show how you got your figures.
Example: simple sale
- You bought 0.5 BTC for ¥2,000,000 in total.
- Later you sell 0.5 BTC for ¥2,800,000.
- Your crypto profit is ¥800,000 (ignoring fees).
That ¥800,000 is part of your miscellaneous income for that year.
If you swap BTC to ETH instead of yen, you calculate the gain using the yen value of the ETH received on the day of the swap.
How mining, staking, DeFi and NFTs are taxed
Crypto tax in Japan is not only about trading. Other activities are also covered:
Mining and staking
Current guides summarising NTA practice say:
- Mining rewards are income when you receive the coins.
- Staking rewards, yields from DeFi lending, liquidity pool rewards, and similar are also taxable on receipt.
- The income amount is the yen market value of the tokens at the time you become able to use them.
Later, if you sell the rewarded tokens at a higher or lower price, you may have additional gains or losses relative to that initial yen value.
Airdrops, referral rewards, and play-to-earn
These are also typically treated as miscellaneous income, using the yen value when you receive them.
NFTs
For now, most guidance applies the same basic logic to NFTs:
- Selling an NFT for crypto or yen can create taxable income (or loss).
- Receiving NFTs as rewards or for work may create taxable income at the time of receipt.
Because NFT transactions can be complex and high-value, many people seek professional advice for large amounts.
Record-keeping: your best defence
The NTA is becoming much more active in looking at crypto. Research from Japanese policy institutes notes that tax investigators now use data from crypto service providers and global information exchange systems (like CRS) to find undeclared crypto income.
To stay safe and reduce stress:
- Download annual CSV reports from each exchange and wallet where possible.
- Keep an export of all trades, deposits, and withdrawals, not just year-end balances.
- Make notes of big one-off transactions, especially OTC trades and transfers from foreign exchanges.
- Consider using a crypto tax calculator that supports Japanese rules and yen conversion.
If you have large overseas balances, also read our guide on Receiving overseas pension or income in Japan.
Special points for expats: residency, overseas exchanges and remittances
Tax residency and worldwide crypto income
As an expat, your crypto tax also depends on your Japanese tax residency status:
- Non-resident: only Japan-source income taxed.
- Non-permanent resident: taxed on Japan-source income plus foreign-source income paid in or remitted to Japan.
- Permanent resident (for tax purposes): taxed on worldwide income, including crypto profits overseas.
If you trade mainly on overseas exchanges, your gains may still be taxable in Japan if:
- You are tax resident here, and
- The profits are considered Japan-source or are remitted to Japan (for non-permanent residents).
For a broad explanation of these concepts, see double taxation and foreign income in Japan and receiving overseas pension or income in Japan: bank and tax tips.
Moving crypto or money into Japan
Japan’s banks must report international money transfers of ¥1,000,000 or more to the tax authorities, including information about sender, receiver, and purpose.
If you:
- Sell crypto on a foreign exchange, and
- Wire the yen or foreign currency into a Japanese bank account
you should keep clear records showing that this money is from crypto trading, plus your cost basis. This makes it easier to explain if the tax office asks.
If you are planning large transfers or moving your life savings, pair this article with our guides on taking money out of Japan when you leave.
Upcoming crypto tax reforms: 20% flat rate on the horizon
Japan is in the middle of a bigger Web3 policy shift. According to recent news and policy analyses:
- The FSA plans to revise the Financial Instruments and Exchange Act to give crypto assets explicit status as financial products and apply insider-trading rules.
- The government and ruling party have announced plans to cut tax on crypto gains from the current progressive system (up to 55%) to a flat 20% separate tax, similar to stocks and forex, with possible loss carry-forward rules.
- Draft legislation is expected to be submitted to the Diet around 2026, and various crypto tax guides refer to 2025–2026 as the expected transition period.
Important for you:
As of November 2025, these changes are proposed but not yet law. For now, you must still file under the miscellaneous income / progressive tax rules described above.
When the law actually passes, we will update our separate article Japan’s crypto tax rules.
How to report your Bitcoin and crypto gains in Japan
Here is a practical step-by-step outline for a typical resident with salary and crypto:
- Collect all your data
- Download trade history from every exchange and wallet.
- List all taxable events: sells, swaps, spending, rewards, airdrops.
- Convert everything to yen
- Use appropriate FX rates for USD/USDT etc. on the transaction dates.
- Calculate profits and income
- Trading: sale value – cost basis (in yen) for each disposal.
- Rewards/airdrops: yen value at receipt.
- Summarise your crypto income
- Add all net trading gains and all reward income = total crypto miscellaneous income.
- Keep a separate note of any losses that offset gains within the same category.
- Check the ¥200,000 threshold
- If your crypto plus other extra income exceeds ¥200,000, you almost certainly need to file a return (if you are a salary earner).
- File your final return (kakutei shinkoku)
- Filing period is usually mid-February to mid-March each year for the previous calendar year.
- You can file online via e-Tax or on paper.
- Report your crypto under the “miscellaneous income” section.
- Keep your records
- Keep your calculations, CSVs, and screenshots for at least 5–7 years in case of questions or audit.
Quick checklist for expats with crypto in Japan
Use this as a quick reminder each year:
- Am I tax resident in Japan this year?
- Do I understand that crypto profits are miscellaneous income up to 55% tax, not capital gains (for now)?
- Have I identified all taxable events (sells, swaps, spending, rewards)?
- Have I converted all transactions into yen correctly?
- Is my total non-salary income (including crypto) over ¥200,000? If yes, am I ready to file a return?
- Am I up to date on upcoming reforms (20% flat tax from around 2026)?
- Do I have good records in case the tax office asks questions?
Final thoughts
Cryptocurrency taxes in Japan can look scary at first, especially when you see numbers like “up to 55%”. But with:
- A basic understanding of how crypto is classified and taxed,
- Good records of your trades and rewards, and
- A simple yearly routine for converting and reporting in yen,
you can stay compliant and still enjoy using and investing in digital assets.
Combine this guide with our related articles on financial planning for expats in Japan, double taxation and foreign income in Japan, and taking money out of Japan to build a crypto strategy that fits your long-term life in Japan.
