Crypto Tax Software Compared: 11 Tools for 2026 (Japan)

As your crypto assets (also known as virtual currencies) gains grow, the final tax return (kakutei shinkoku) becomes something you can't avoid. Once you're trading across multiple exchanges and dabbling in DeFi and NFTs, manual spreadsheet calculations break down almost immediately. Tracking transactions across fiscal years, records from overseas exchanges, and staking rewards to arrive at a clean profit/loss figure is no longer realistic without dedicated software.

This article introduces services for calculating crypto gains and losses and filing your final tax return, grouped into three types: domestic software, outsourced calculation services, and overseas tools. We'll cover the basics of tax filing, walk through the key criteria for choosing a service, and then look at the coverage, pricing, and operating company for each one in detail. Use this as a reference to find the tool that fits your own trading style.

The first thing to check is the so-called "¥200,000 line." For salaried employees, if income outside of salary — including crypto gains, which fall under miscellaneous income — exceeds ¥200,000 (roughly $1,300 at ¥150/USD) in a year, a final tax return is required. Crypto gains are, in principle, treated as miscellaneous income under aggregate taxation (comprehensive taxation), meaning they're combined with salary and other income to determine your tax rate. In a year you made a profit, start by checking whether you're required to file at all. Because the exact tax amount and deductions depend on individual circumstances, it's safest to confirm the final judgment with a tax accountant or the tax office.

Note for readers outside Japan: Under the tax rules in effect as of July 2026, gains from selling crypto assets are taxed as miscellaneous income under aggregate (progressive) taxation. Following the July 15, 2026 passage of the amended Financial Instruments and Exchange Act (FIEA) in the House of Councillors, crypto assets are set to be reclassified as financial instruments under the FIEA, with a flat 20% separate self-assessment tax rate expected to apply starting the fiscal year after the amended law takes effect (likely January 2028). Also note that losses from crypto trading can only be offset against other miscellaneous income — they cannot be offset against salary or other income categories.

What Is Crypto Tax Software, and Why Do You Need It?

Crypto asset profit/loss calculation software imports your history from exchanges and wallets, automatically works out your annual gains and losses, and formats the results so you can use them for your tax return. It turns a task that could take hours to do by hand into a few minutes to a few dozen minutes.

What Profit/Loss Calculation Software Does

Broadly speaking, these tools do three things. First, they import your transaction history — connecting to exchange APIs or CSV files to pull in records of trades, transfers, and swaps all at once. Second, they calculate profit and loss, automatically converting values into Japanese yen and computing acquisition costs using prescribed methods such as the total average method or the moving average method. Third, they output documents — an annual profit/loss summary and aggregated data that can be transcribed directly onto your final tax return.

The more exchanges, overseas exchanges, DeFi, and NFTs you're dealing with, the more room there is for manual calculation errors. The real value of using software isn't just speed — it's reducing missed transactions and calculation mistakes.

The Threshold That Triggers a Filing Requirement

Profits from crypto assets are, in principle, classified as miscellaneous income and subject to aggregate taxation. If you're a salaried employee receiving pay from a single employer, you need to file a return once your non-salary income exceeds ¥200,000 in a year. The threshold differs depending on your situation — for example, if you're a dependent or a sole proprietor. Once you've made a profit, check early whether filing applies to your specific case. When in doubt, consulting the tax office or a tax accountant is the surest way to know.

How to Choose Crypto Tax Software: 5 Things to Check

There are a lot of tools out there, and their coverage and pricing vary widely. Working backward from the conditions your own trading requires will keep you from getting lost in the options. Here are the five things to check.

Number of Supported Exchanges and Currencies

Whether a tool supports the exchanges you actually use is the baseline requirement. Most software covers the major domestic Japanese exchanges, but coverage of overseas exchanges and minor currencies varies. The more currencies a tool supports, the less likely you are to miss altcoin transaction history.

Support for DeFi, NFTs, and Overseas Exchanges

DeFi swaps, liquidity provision, and NFT trades can't be fully captured with exchange CSV files alone. For anyone active in DeFi, whether a tool can connect to your wallet to pull in on-chain activity, and whether it supports bridges and Layer 2 networks, is a key differentiator.

Accounting Software Integration and Corporate Support

If a tool can export journal entry data to platforms like freee, Yayoi Kaikei, or Money Forward Cloud, it makes bookkeeping much easier for corporations and sole proprietors alike. If you handle crypto assets as a corporation, be sure to check whether the tool offers corporate support.

Pricing and Free-Tier Limits (Transaction Count Caps)

Many tools offer a free plan, but most cap the number of transactions you can process. If you only trade a handful of times a year, the free tier will likely be enough — but once your transaction count grows, a paid plan becomes necessary. Pricing is typically tiered by transaction count and feature set, so look for a plan that matches your annual trading volume. Always confirm current pricing directly with each provider's official information, as of the time you check.

Support (Tax Accountant Supervision, Outsourced Calculation, Japanese-Language Support)

If you're not confident going it alone, look at whether a tax accountant supervises the service, whether the calculation itself can be outsourced, and whether Japanese-language support is available. With overseas tools, the user interface may be available in Japanese even when the support desk only operates in English — keep those two things separate when evaluating a tool.

[Domestic] Software Built for Japan's Crypto Tax Filing

From here, we'll introduce domestic services, one by one, that offer Japanese-language support and are built around Japan's tax system. Pricing and coverage are based on each company's official information as of the time of writing. Please confirm current pricing on the official website before signing up.

Cryptact | pafin Inc.

Official site: https://www.cryptact.com

Cryptact is run by pafin Inc. (Frontier Kojimachi 5F, 3-2-4 Kojimachi, Chiyoda-ku, Tokyo) and is considered one of the standard profit/loss calculation tools in Japan. It supports a large number of exchanges and currencies, automatically importing transaction history and calculating gains and losses. It supports both the total average method and the moving average method, and you can download the results to use for your final tax return. There's a free plan, and paid plans start at ¥6,600/year (roughly $44/year, per official information as of the time of writing). It can also automatically identify and calculate DeFi and NFT transactions. This is a good first tool to try if you're not sure what to pick.

Gtax | Aerial Partners, Inc.

Official site: https://crypto-city.net

Gtax is a profit/loss calculation service run by Aerial Partners, Inc. (Minato-ku, Tokyo). It supports over 70 domestic and overseas exchanges and wallets, and can calculate using both the total average method and the moving average method. It can output an annual transaction report and profit/loss statement, and can pass journal entry data to freee, Money Forward Cloud, Yayoi Kaikei, and other accounting software. The free plan covers up to 100 transactions per year, with paid plans starting at ¥5,500/year (roughly $37/year, per official information as of the time of writing). This is a good fit if you prioritize accounting software integration or want your records ready to hand off to a tax accountant.

Cryptolinc | Cryptolinc Inc.

Official site: https://cryptolinc.com

Cryptolinc is a service run by Cryptolinc Inc. What sets it apart is that it goes beyond a profit/loss calculation tool, offering outsourced calculation, tax audit support, and referrals to tax accountants experienced in crypto assets. It manages transaction data from multiple exchanges and wallets in one place, and also covers overseas exchanges and NFT transactions. It supports both the total average method and the moving average method, and alongside a free plan, offers a relatively affordable pricing structure starting at ¥300/month for up to 500 transactions a year (per official information as of the time of writing). This is a good fit for people who want to calculate things themselves but have the option to bring in a professional if needed.

RIKYU Crypto Accounting | RIKYU Inc.

Official site: https://rikyu.io

RIKYU Crypto Accounting is a cloud service run by RIKYU Inc. that specializes in on-chain assets. It automates the process from calculating profit and loss on wallet transactions, to generating journal entries, to preparing your final tax return. Three products are available: "RIKYU" for individuals, "RIKYU Biz" for corporations, and "RIKYU Partner" for tax accountants and accounting firms, and it integrates with freee, Money Forward, and Xero. This is a good fit for anyone who wants to take on-chain transactions, including DeFi, all the way through to accounting in one flow. Pricing is set separately per product, so check the official site for details.

[Outsourced] Handing It All Off Instead of Calculating It Yourself

Too many transactions, DeFi that's too complex, or simply no time — for people in this position, there's an "outsourced" option: handing the calculation itself over to a professional. Instead of operating an automated tool yourself, you provide your transaction history and have the entire calculation done for you.

When Outsourced Calculation Makes Sense

Outsourcing is a good fit when overseas exchanges, DeFi, NFTs, and blockchain games are all mixed together to the point that even automated tools throw frequent errors. It also suits people whose transaction count runs into the thousands or tens of thousands, or who are up against a tax filing deadline with no time left to do the work themselves. It costs money, but the idea is that you're buying down the risk of calculation mistakes and buying back your time.

Cryp-tax | Trident Research Inc.

Official site: https://cryp-tax.net

Cryp-tax is an outsourced calculation service run by Trident Research Inc. Rather than an automated tool, dedicated staff perform the calculation manually based on your transaction history. It covers overseas exchanges, NFTs, DeFi, and blockchain games, and can connect you through to final-tax-return support from an affiliated tax accountant. Pricing is tiered by the scale of your transactions, and you can start with a free consultation over LINE (per official information as of the time of writing). This is for people who want to hand over their history and be done with it.

Note that Cryptolinc, introduced in the previous section, also offers an outsourced calculation service in addition to its tool. One approach is to calculate things yourself with a tool most years, and switch to outsourcing only in a particularly complicated year.

[Overseas Tools] If You're Choosing Based on Global Coverage

If you use several overseas exchanges, tools built outside Japan become an option. Their strength is the sheer number of exchanges and chains they can connect to. That said, there are some caveats. Even when the user interface is in Japanese, the support desk is almost always English-only, and coverage of Japan's tax rules (yen conversion, and the total average and moving average methods) varies from tool to tool. Read the notes in the comparison table carefully to gauge how usable each tool actually is in Japan.

Among the overseas tools, Koinly and CoinLedger are the ones explicitly targeting Japan, but note that Koinly only supports the moving average method and doesn't support the total average method, which is commonly used in Japan. Tools built specifically for US filing, like ZenLedger, aren't suited for a Japanese final tax return. In the end, a realistic approach is: if your trading is mostly on domestic exchanges, use a domestic tool; if it's mostly overseas exchanges, import your data with an overseas tool first, then finish the calculation with a domestic tool or a tax accountant.

Comparison Table (All 11 Services)

Here's a single table summarizing all the services covered so far, so you can compare them at a glance by type, operator, free tier, Japan tax compliance, and official URL.

Summary: Recommendations by Type

Finally, here's a breakdown by reader type. If your trading is mostly on domestic exchanges and you want an easy starting point, go with the standards, Cryptact or Gtax. If you want to keep costs down while having a professional available when needed, Cryptolinc is a good fit. If you're heavy into DeFi and NFTs, cover your on-chain activity with Cryptact's automatic DeFi transaction detection or on-chain-focused RIKYU. If it all feels like more than you can handle, hand it off entirely to an outsourced service like Cryp-tax. If most of your trading is on overseas exchanges, import your data with an overseas tool like Koinly first, then finish the calculation under Japan's tax rules. Work through these in order and you should be able to narrow it down to the one that fits you.

Whichever tool you use, ultimate responsibility for the filing rests with you. If you're not confident in the calculation results, or your trading is especially complex, it's safest to have a tax accountant experienced with crypto assets check your figures. If you want to get a fuller picture of your holdings, take a look at our separate article comparing crypto portfolio management apps (in Japanese).

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FAQ: Common Questions About Crypto Tax Filing in Japan

Q. How much profit before I need to file a tax return?

A. For salaried employees receiving pay from a single employer, a return is required once non-salary income — including crypto gains classified as miscellaneous income — exceeds ¥200,000 in a year. The threshold differs for dependents and sole proprietors, so confirm your specific case with the tax office or a tax accountant.

Q. Can I get everything done with free tools alone?

A. If you have relatively few transactions, you may be able to complete your profit/loss calculation entirely within a free plan. That said, most software caps the free tier at a certain transaction count, and a paid plan becomes necessary once you exceed it. The final tax return filing itself is then either done by you, based on the calculation results, or handled by a tax accountant.

Q. Can these tools calculate profit/loss from overseas exchanges and DeFi too?

A. It depends on the tool. Some domestic tools do support overseas exchanges and DeFi, but coverage varies. If you're heavily active in DeFi and NFTs, connecting a wallet directly to a tool built for that (such as RIKYU), using a tool with automatic DeFi transaction detection (such as Cryptact), or using an outsourced calculation service, is the more realistic option.

Q. Is it better to calculate it myself or hand everything to a tax accountant?

A. If your trading is small and simple, calculating it yourself with a tool will generally cost less. If your transaction volume is huge, your overseas or DeFi activity is complex, or you're short on time, outsourcing or hiring a tax accountant can end up cheaper once you factor in the risk of calculation mistakes and the time involved. Base your decision on your trading volume and complexity.

This article is for informational purposes only and does not constitute financial or investment advice. Please consult a qualified professional before making investment decisions.