Mitsubishi UFJ Bank, Sumitomo Mitsui Banking Corporation, and Mizuho Bank plan to jointly issue a yen-pegged stablecoin before the end of Japan's fiscal year on March 31, 2027. The three institutions, which collectively serve more than 300,000 corporate clients, will build on a shared blockchain infrastructure called Progmat and operate under supervision from Japan's Financial Services Agency. The initiative, formally named Project Pax, is designed to replace slow, costly interbank transfers with near-instant digital settlement. The project was first reported by Nikkei and cited by Channel News Asia; the primary Nikkei account is paywalled, and no direct on-the-record statements from named bank executives have been confirmed through accessible public sources.

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How It Works

Progmat is a regulated blockchain platform originally spun out of Mitsubishi UFJ in partnership with NTT Data and regional banking partners. It already handles tokenized securities and asset-backed products in live production environments, so the stablecoin layer represents an expansion of existing infrastructure rather than a greenfield experiment. The platform supports multiple public blockchains; secondary sources including Cryptometer and Ledger Insights cite compatibility with Ethereum, Polygon, Avalanche, and Cosmos, though this list has not been independently verified against official Progmat documentation and specific chain names should be treated as unconfirmed pending primary source review. Settlement routing between those networks is handled by Datachain, a cross-chain interoperability middleware layer co-developed as part of Project Pax, according to Cryptometer and Ledger Insights.

The stablecoin will be classified as an Electronic Payment Instrument under Japan's Payment Services Act, the legal category created by the June 2022 Stablecoins Amendment Act, a parliamentary amendment that formally defined fiat-backed stablecoins in Japanese law. That framework restricts issuance to licensed banks, trust companies, and fund transfer service providers. Algorithmic stablecoins, which rely on automated supply mechanisms rather than direct fiat reserves, are explicitly excluded.

Proof-of-concept testing began in November 2025 through the FSA's Payment Innovation Project. The banks are now forming a dedicated inter-bank discussion council to finalize operating rules and approved use cases ahead of the formal launch.

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Already in Use

The initiative is not purely theoretical. Mitsubishi Corporation, the trading conglomerate, has been using Progmat-issued stablecoins to move funds between its Tokyo headquarters and more than 240 overseas subsidiaries, according to data reported by Cryptometer and CryptoRank. Cryptometer describes it as a real first-mover case: a major Japanese enterprise running intra-group treasury operations on a bank-grade blockchain network in live production rather than in a controlled test environment.

The stated technical goal is compressing settlement time from T+1 (settlement one business day after a transaction) to T+0, meaning real-time finality. That claim originates with Cryptometer, citing the Digital Asset Co-Creation Consortium operated by Progmat. For large corporates managing cross-border supply chains, that shift can meaningfully reduce the cash tied up waiting for payments to clear.

Project Pax is also considering US dollar-denominated issuance alongside the yen version, which would broaden its utility for international trade flows, though dollar issuance remains under consideration rather than a confirmed component of the launch plan.

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Market Context: JPY Stablecoins Are Still Small

The megabank initiative enters a yen stablecoin market that exists but remains limited in scale. According to CoinGecko data as of June 10, 2026, the total market capitalization of JPY-pegged stablecoins sits at roughly $36.7 million. The largest existing token, JPYC from JPYC Inc., holds approximately $18.5 million of that, with a circulating supply near 1.9 billion tokens and a 24-hour trading volume around $191,000. The token trades close to its peg at roughly $0.0063, equivalent to about 0.94 yen per token. All market figures reflect CoinGecko and CoinMarketCap data as of the article date and will fluctuate.

JPYC Inc. launched what the FSA described as the world's first fully regulated yen-pegged stablecoin in October 2025, backed by a 4.6 billion yen (approximately $30 million) Series B funding round that included Metaplanet, a Japan-listed Bitcoin treasury company, as a named backer. JPYC targets 1 trillion yen in total issuance over three years, the same headline figure Project Pax is targeting by 2028 through a different distribution channel. Both projects may be drawing on the same underlying market-size estimates, and their targets should not be read as directly comparable milestones.

A third active yen stablecoin, JPYSC, backed by a Japanese trust bank and launched in early 2026, entered the market as the first yen stablecoin with trust bank reserves, rounding out a competitive landscape that barely existed two years ago.

SBI Holdings, working with Startale Group, signed a memorandum of understanding in December 2025 for a competing yen stablecoin product. The agreement targeted a Q2 2026 launch; as of the publication date that window has passed without a confirmed launch announcement.

No on-chain data is available yet for Project Pax tokens specifically. The initiative has not listed any publicly traded instrument, and the current design is strictly business-to-business. Developers and retail users should not expect public minting interfaces or exchange listings in the near term.

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Regional Implications

The practical impact of this initiative extends beyond Japan. Asia-Pacific now accounts for roughly 60 percent of global stablecoin payment volume, representing approximately $245 billion, according to data cited by AlphaPoint and Payment Expert. South Asian stablecoin transaction volume grew 80 percent year-over-year through mid-2025, reaching approximately $300 billion over the January to July 2025 period, according to AlphaPoint. Traditional wire transfers through correspondent banks typically carry fees of 2 to 7 percent of the transfer value. Blockchain-based alternatives have brought that cost to between 0.1 and 0.5 percent for operators who have integrated them, according to industry data.

Japan is the second-largest source of remittances to South Asia by volume, behind only the United States and Gulf states. A bank-grade yen stablecoin accessible through compatible blockchain infrastructure could allow payment operators serving those corridors to reduce costs substantially, provided the FSA's transfer rules eventually permit that kind of third-party access. The MUFG and Progmat partnership already includes components targeted at emerging-market trade finance: Standage, an export settlement platform, and Ginco, a Web3 wallet provider, are part of the project and were explicitly designed to serve importers in markets with limited US dollar access or letter-of-credit constraints, a profile that fits many South Asian trade finance participants directly.

Mitsubishi Corporation's existing role in African infrastructure finance through Japan's official development assistance channels is also relevant. Japanese trading companies regularly make project payments across East Africa, and Progmat's infrastructure is being tested for exactly those kinds of cross-border institutional flows. For African markets specifically, stablecoin usage is currently dominated by USDT on the TRON network, meaning a yen-denominated institutional alternative would represent a structural shift rather than incremental competition. The policy dimension is also significant: central banks in Kenya, Ghana, and Nigeria are reported to be tracking Japan's regulatory framework as a template, a middle path between permitting fully private stablecoin issuance and deploying a central bank digital currency of their own.

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What Comes Next

Project Pax needs to complete its governance council process and receive FSA clearance before any public-facing service launches. The March 2027 deadline is the current target, though it is worth noting that November 2025 reporting pointed to March 2026 as an initial goal, suggesting timelines in this space can shift.

Separately, new FSA rules that took effect on June 1, 2026 created a framework allowing foreign trust-structured stablecoins, including products comparable to USDC or EURC, to be distributed in Japan by registered local providers. All Cabinet orders under Japan's Payment Services Act are scheduled to come into full operational effect on June 13, 2026, making that an immediate regulatory milestone to watch. This update may represent the more immediate opportunity for developers building payment tooling for Japanese users, while Project Pax matures through its institutional rollout phase.

Several components of the Project Pax architecture carry additional implications for developers and technical builders. Datachain's interoperability layer includes connections to the Inter-Blockchain Communication protocol used across the Cosmos ecosystem, which has meaningful adoption across South and Southeast Asia. The Ginco wallet SDK integration opens a potential path for Web3 wallet providers to connect into the settlement layer. The FSA has not yet issued guidance on whether access to Project Pax tokens will be permissioned or permissionless, a question that will significantly shape which third-party applications can ultimately be built on top of the infrastructure.