Japan’s three largest banks have now shown they can run one yen stablecoin together instead of building three incompatible ones. On October 16, Mizuho Bank, MUFG Bank and Sumitomo Mitsui Banking Corporation (SMBC), working with Mitsubishi UFJ Trust and systems provider TISI, published the results of a July pilot for a shared, deposit-backed yen token aimed at corporate payments. The announcement matters less for what it launches today than for what it proves about coordination among rivals — a working example of a shared digital-money rail in a market where banks have historically guarded their own payment networks.
One token, one trust
The structure is what makes the pilot notable. Mizuho, MUFG and SMBC act as joint trustors, while Mitsubishi UFJ Trust serves as trustee and issues the stablecoin as “specified trust beneficiary rights” under Article 2(9) of Japan’s Payment Services Act. That is the vehicle the country’s revised payments framework created for bank-issued stablecoins: several banks can stand behind a single token instead of each running its own issuance program.
The design assumes a token backed by bank deposits that circulates only between users who have passed bank identity checks — a framing the banks themselves describe as a current assumption that could change. One shared yen token concentrates network effects for cross-border corporate payments, whereas three separate bank tokens would fragment liquidity and multiply anti-money-laundering work. Shared plumbing also lowers the cost of running the token while each bank keeps its own customer relationships.
What the pilot tested
Between July 17 and 23, the five companies walked a single corporate corridor through the full issue-transfer-redeem cycle, using cross-border settlement between Mitsubishi Corporation’s Japanese and overseas bases. The exercise checked how a multi-trustor scheme should be operated, whether AML and CFT controls hold up across different use cases, and whether the underlying systems function. In practice, that meant confirming the operating model, the controls and the technology in a single exercise rather than treating them as separate questions.
What it does not establish
A passing pilot is not a forecast of adoption. The test covered one corporate use case rather than retail or open circulation, and it centered on a single trading house’s cross-border flows, so it offers little evidence about wider demand. Dollar stablecoins such as USDT and USDC still dominate global stablecoin flows, and Japan’s yen-token field already includes trust-bank offerings, which means the megabanks will be competing for a niche rather than creating one from nothing. The banks also framed user protection, AML and CFT, cybersecurity and system stability as work that remains outstanding.
What to watch next
The banks are aiming to begin real transactions within fiscal 2026, which ends in March 2027, and to form a joint council to keep the work moving under a plan announced in June. The underlying effort was selected in November 2025 by a Financial Services Agency payment-innovation project known as PIP. For readers, the signal to watch is whether the next milestone expands beyond a single corporate corridor — because the jump from a controlled pilot to live, multi-party circulation is where the open questions actually sit.
Adapted from Japan’s Three Megabanks Confirm Their Shared Yen Stablecoin Works in Pilot.