Japan's 3 Biggest Banks Join Forces to Launch Yen Stablecoin by March 2027

Japan’s three largest banks announced plans Wednesday to jointly issue a yen-pegged stablecoin and begin live commercial transactions before March 2027, a direct move to build domestic digital payment rails as USD-denominated stablecoins hold an estimated 84% to 90% of the $300+ billion global market.

• Key Takeaways:
• • MUFG, Mizuho, and SMBC signed an MOU on June 10, 2026, to issue a joint yen stablecoin.
• • The banks target live corporate transactions by March 2027, built on a November 2025 FSA pilot.
• • USD stablecoins hold 84 to 90% of a $300B market Japan’s megabanks now plan to challenge.

Banks Sign MOU, Form Governance Council

MUFG Bank, Mizuho Bank, and Sumitomo Mitsui Banking Corporation (SMBC) confirmed the initiative in a coordinated press release on June 10, 2026. The three banks have entered a memorandum of understanding to establish a voluntary council tasked with examining operational frameworks, governance structures, and the technical infrastructure required for issuance.

“The Three Banks aim to conduct actual commercial transactions during fiscal year 2026 using a stablecoin,” the joint release states, with the banks acting as joint settlors under a trust agreement and a licensed trust bank serving as trustee.

Fiscal year 2026 in Japan ends March 31, 2027.

Built on a 2025 FSA Proof of Concept

The announcement accelerates a pilot that the Financial Services Agency (FSA) approved in November 2025 through its FinTech Proof-of-Concept Hub. That earlier experiment tested joint issuance of standardized, mutually exchangeable yen-denominated stablecoins for corporate use, with Mitsubishi UFJ Trust and Banking Corporation managing deposited funds as trust assets.

Mitsubishi Corporation used the pilot stablecoins for cross-border payments between its Japanese and overseas offices, targeting lower remittance fees and reduced administrative overhead. The system ran on the Progmat platform, a distributed ledger technology infrastructure with deep ties to MUFG.

Regulatory Structure

The trust agreement model fits cleanly within Japan’s amended Payment Services Act, which took effect in 2023. Under that framework, licensed banks, fund transfer providers, and trust companies can issue fiat-pegged digital money redeemable at par. Assets must be held as deposits in a licensed Japanese trust bank, providing clear segregation and redemption protections.

Japan’s ruling Liberal Democratic Party added further support on June 1, 2026, when an LDP panel submitted a proposal to Finance Minister Satsuki Katayama recommending promotion of yen-based stablecoins for settlements across Asia and a legal framework for crypto ETF trading.

What This Means for the Market

The three megabanks collectively serve hundreds of thousands of corporate clients. A standardized, interoperable yen stablecoin operating at that scale could pull significant settlement volume away from incumbent USD-pegged tokens.

JPYC, the leading private yen stablecoin issuer, currently holds a market cap of roughly $18 million. The combined institutional weight of MUFG, Mizuho, and SMBC represents a fundamentally different order of magnitude.

Japan’s strategic rationale is explicit: counter the dominance of USDT and USDC, reduce yen-to-dollar conversion pressures in digital settlements, and establish domestic digital payment infrastructure before foreign stablecoins entrench further in Asian corporate finance.

What Comes Next

The council will focus on issuance infrastructure, system and scheme design, governance, and coordination with other financial institutions. The banks have left the door open to expanding the initiative to additional participants.

Live commercial transactions remain the stated target for fiscal year 2026. The timeline is tight, but the regulatory groundwork is already in place, the technology platform is operational, and the three largest banks in Japan are now formally aligned.