Japan Passed Landmark Crypto Law, But Stablecoin Payroll Workers Have No Tax Rules

How DeFi Is Taxed Under Current Japanese Rules

For the developers, liquidity providers, and yield farmers that Japan's Web3 policy is explicitly designed to attract, the current tax environment is structurally punishing in ways that the FIEA reform did not address.

Under guidance the NTA has applied in practice since its first crypto FAQ in 2017, depositing tokens into a liquidity pool is treated as a disposal of the original tokens and an acquisition of pool tokens — a taxable event at the prevailing market value in yen at the moment of deposit. DeFi interest, yield farming returns, and liquidity rewards are treated as miscellaneous income when credited to a wallet, not when withdrawn or sold, meaning a participant owes tax on rewards as soon as they are available even if they immediately reinvest them at no gain. These principles are confirmed by Japan DeFi tax analysis from KoinX and TokenTax's Japan guide.

Gas fees tied to taxable transactions are deductible, but losses from DeFi positions cannot be offset against other income categories. The result is an asymmetric tax structure: gains from DeFi activity are taxed in full at progressive rates up to 55% in the year they occur; losses provide no corresponding relief.

These principles, while applied consistently by the NTA, have never been codified in formal regulations — they exist as administrative FAQ guidance, not as statutory rules. That gap creates significant compliance risk for both the Japanese developers Japan says it wants to retain and the foreign Web3 builders Japan is actively recruiting. The BCCC committee has specifically cited profit recognition and valuation methods for DeFi income, as well as transaction data management, as areas it intends to address in proposals to tax authorities.

Megabanks Are Months Away From a Launch With No Tax Playbook

The stablecoin tax gap carries institutional weight that extends well beyond individual traders or logistics contractors.

Japan's three largest banks — Mitsubishi UFJ Financial Group (MUFG), Sumitomo Mitsui Banking Corporation (SMBC), and Mizuho — have established a joint council to issue a yen-pegged stablecoin by the end of Japan's fiscal year 2026, which runs through March 31, 2027. The project, built on the Progmat blockchain infrastructure platform and structured through a trust arrangement with the three banks as joint settlors, targets ¥1 trillion (approximately $6.3 billion) in business-to-business settlement volume by 2028. An FSA-supervised proof of concept began in November 2025 and involved Mitsubishi Corporation's Japanese and overseas offices as the first commercial user, according to Nikkei reporting via Bitget News.

No formal tax accounting guidance exists for how a corporate recipient of this stablecoin — or the megabanks' 300,000-plus business partners who could eventually receive it — should treat incoming stablecoin payments under Japanese law. The FSA's 2026 Tax Reform Outline addressed gains from specified crypto assets on licensed exchanges. It did not address the tax treatment of stablecoin payments, stablecoin-denominated business income, or the accounting rules that apply when a company receives a megabank-issued yen stablecoin in settlement of an invoice.

The BCCC's committee timing — announced four weeks after the FIEA's enactment and before the FSA's end-of-2026 framework deadline — reflects a deliberate attempt by Japan's blockchain industry to insert credible, technically grounded proposals into the remaining rulemaking window.

Yasunori Yagihashi and the Committee's Institutional Weight

The BCCC's choice of committee chair signals that the effort is intended to be a practitioner-led policy document, not a lobbying statement.

Yasunori Yagihashi, representative of tax accounting firm Fasio Consulting, brings more than a decade of hands-on experience in crypto taxation to the role. Before establishing his practice, Yagihashi worked at major Japanese financial institutions. Since Japan's National Tax Agency issued its first crypto tax FAQ in 2017, he has provided practical support and public education on the topic, with more than 200 speaking engagements reaching over 20,000 participants, per the WEEX BCCC announcement. The vice-chair is Yuichi Murakami of Murakami Certified Public Accountants.

Hirano, the BCCC's chairman, is concurrently CEO of Asteria Corporation, a Tokyo Stock Exchange Prime Listed middleware company, and serves as adjunct professor at Kyoto University's Graduate School of Management — a role confirmed by Asteria's management page. He founded the BCCC in 2016 with the explicit goal of building platform-neutral blockchain interoperability across industries, and has overseen its expansion into dedicated policy subcommittees covering finance, stablecoin adoption promotion, and DeFi. The Taxation Committee is the newest addition to that structure.

The committee's stated work program includes study sessions and subcommittees, case-study sharing among participating companies, investigation of international tax trends, and preparation of formal proposals addressing profit recognition and valuation methods for stablecoins and DeFi, as well as transaction data management standards. The proposals will be directed to the National Tax Agency and relevant ministries.

Japan's Window to Shape the Rules Before They Are Written

The BCCC committee's September 15 kickoff is not simply a calendar event. It marks the beginning of a deliberate effort to produce formal policy input before the FSA finalizes its stablecoin and custody framework by the end of 2026 — a deadline that will shape the tax and compliance architecture for Japan's entire digital asset economy through the late 2020s.

Japan's position in the global stablecoin race is legitimately strong. Its PSA framework, in effect since June 2023, was the world's first comprehensive fiat-backed stablecoin licensing regime. The June 2026 expansion created a compliance pathway for foreign trust-type stablecoins, enabling USDC and Ripple's RLUSD to enter regulated Japanese distribution. Singapore and Hong Kong still offer zero capital gains on crypto for individuals — a gap Japan will not fully close even after 2028 for DeFi and stablecoin participants. The Digital Garage stablecoin middleware reaching 1.3 million Japan merchants is the latest signal that payment infrastructure is outpacing the tax framework.

The JCBA and JVCEA jointly requested, as of July 2025, a flat 20% tax with loss carryforward applying equally to all token types and wallets — a framework that would cover DeFi and stablecoin income. The BCCC's committee now enters that conversation with a specific mandate to propose how the practical mechanics — how stablecoin payroll income is valued, how DeFi disposal events are recorded, how international tax developments inform Japan's own rules — should work in practice.

If the committee can produce credible, technically grounded proposals before the FSA closes its consultation, it has a genuine opportunity to shape the guidance that will govern Japan's digital asset economy for years to come. If it cannot, the framework will be written by regulators working without a detailed industry picture of the commercial realities that have already overtaken the law.

This article is for informational purposes only and does not constitute financial, investment, legal, or tax advice.

Frequently Asked Questions

Does Japan's new crypto law cover how stablecoins are taxed?

No. The FIEA amendment enacted on July 15, 2026, reclassified 105 specified crypto assets — including Bitcoin, Ethereum, and XRP — as financial instruments subject to securities-style rules and laid the groundwork for a flat 20.315% capital gains tax rate targeted for 2028. Stablecoins were explicitly excluded from the FIEA and remain regulated under the Payment Services Act as Electronic Payment Instruments. No formal NTA guidance currently specifies how yen stablecoin payments, stablecoin payroll income, or stablecoin-denominated business revenues are classified for tax purposes. The FSA has committed to finalizing a stablecoin framework by end-of-2026; the BCCC's new Taxation Committee is designed to submit industry proposals before that deadline closes.

How is DeFi income taxed in Japan right now, and does the 2026 reform change that?

DeFi income in Japan is currently taxed as miscellaneous income at progressive rates reaching approximately 55% — and the 2026 reform does not change that. The FIEA's flat 20.315% rate applies only to "specified crypto assets" traded on FSA-licensed domestic exchanges through eligible spot, derivative, or ETF structures. Staking rewards, liquidity pool returns, yield farming income, and all transactions on foreign or unregistered platforms remain in the old progressive system. Under current NTA practice, depositing tokens into a liquidity pool is treated as a disposal of the original tokens and an acquisition of pool tokens — a taxable event at market value — and DeFi yields are treated as miscellaneous income when credited. These rules have never been formally codified; they exist as administrative FAQ guidance. The BCCC committee's mandate specifically includes profit recognition and valuation methods for DeFi income as a priority for its policy proposals.

What is the BCCC and why does it have standing to propose tax rules?

The Blockchain Promotion Council — known by its Japanese acronym BCCC — is Japan's oldest and most comprehensive blockchain industry organization, founded in April 2016. It now operates committees covering finance, stablecoin adoption promotion, DeFi, and taxation. It is not a government agency but functions as a formal industry-government dialogue channel, producing policy proposals directed to the National Tax Agency and Financial Services Agency. Its Taxation Committee is led by Yasunori Yagihashi of Fasio Consulting, a crypto tax specialist with more than 200 public engagements on the topic and over 20,000 participants reached since Japan's first NTA crypto tax FAQ in 2017. The BCCC's proposals do not bind the FSA or NTA, but formal industry submissions from a body with this track record are typically incorporated into the FSA's consultation process.

If I'm receiving stablecoin payments as a business or individual in Japan, what should I do now?

There is no definitive official guidance on this question as of August 2026, which is precisely the gap the BCCC committee exists to address. Based on current NTA practice, a stablecoin received in payment is likely treated as a crypto asset disposal triggering miscellaneous income, valued in yen at the time of receipt — but this has not been formally confirmed for licensed yen stablecoins received as payroll or business income. Consulting a Japanese tax professional with specific crypto expertise — such as those affiliated with Fasio Consulting or similar practices active in the NTA FAQ process — is the most reliable course until the FSA finalizes its framework. The BCCC's September 15 committee kickoff and subsequent study sessions will track the rulemaking process in real time; monitoring those outputs is the most direct way to follow how the guidance develops.