Japan - Complete Tax Report

Japan has some of the highest crypto tax rates in the world, with gains taxed as miscellaneous income (雑所得 / Zatsushotoku) under the Japanese tax system. The KoinX Complete Tax Report for Japan calculates your gains according to National Tax Agency (NTA) guidelines. This report compiles crypto trading gains, derivatives income, staking rewards, DeFi income, and transaction-level records into one document for your 確定申告 (Kakuteishinkoku) annual tax return.

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What Is in This Report?

The Japan Complete Tax Report contains the following sections:

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How Japan Taxes Crypto

Japan treats cryptocurrency gains as miscellaneous income rather than capital gains. Crypto income is combined with other miscellaneous income categories when calculating your final tax liability.

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Miscellaneous Income Summary

The report includes a summary of taxable crypto income generated during the year. This summary provides the total amount that must be reported in your Kakuteishinkoku.

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Every Trade Is Taxable

Under Japanese tax rules, almost every crypto transaction triggers taxation: This means even crypto-to-crypto swaps create taxable gains or losses.

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Cost Basis Methods in Japan

The NTA allows two calculation methods: Once selected, the same method must be used consistently across tax years.

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Summary of Income from Crypto Derivatives

If you trade derivatives, the report includes a summary of futures and options trading results. This section helps calculate derivatives income as miscellaneous income.

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Other Income & Expense Summary

This section includes crypto received as income rather than through trading. Examples include:

• Airdrops
• Staking rewards
• Mining income
• Salary paid in crypto
• Consultancy income

Expenses may include:

• Margin fees
• Mining expenses
• Donations
• Consultancy expenses
• Miscellaneous costs

All income is valued at fair market value at the time received.

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Detailed Beginning of Year Balance of Assets

Shows the portfolio position at the start of the financial year. Each entry includes:

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Detailed End of Year Balance of Assets

Shows the portfolio position on the last day of the financial year. Why these reports matters:

• Shows your starting position for the year
• Helps verify that cost basis carry-forward is correct
• Useful for audit trail and reconciliation

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Capital Gains Transactions

This section lists all crypto disposals that generated gains or losses. This section serves as the audit trail for tax calculations.

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Crypto Derivatives Transactions

This section provides a detailed list of futures and options trades. These transactions support the derivatives summary earlier in the report.

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Other Income Transactions

This section lists detailed income and expense events such as:

• Reward income
• Staking interest
• Airdrops
• Mining income
• Salary payments
• Consultancy income
• Donations
• Mining expenses

Each record includes date, asset, quantity, description, value, and exchange source.

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Asset Wise Profit & Loss

This section summarises profit and loss for each cryptocurrency asset. This helps identify which assets contributed most to your gains or losses.

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Data Sources

The final section lists all integrations used to generate the report, including exchanges, wallet addresses, and custom file imports. This ensures transparency about where the data originated.

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DeFi and Staking Under Japanese Rules

All crypto income is treated as miscellaneous income. These values become the cost basis for future disposals.

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Filing Your Kakuteishinkoku

Japan’s tax year runs from January 1 to December 31. The filing deadline is typically March 15 of the following year. To file: calculate total crypto miscellaneous income using the KoinX report, combine it with other miscellaneous income, file via e-Tax or paper return, then pay any taxes owed. If you work with a Zeirishi (tax accountant), share the KoinX report with them.

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Frequently Asked Questions