Japan's three largest banks are moving from proof-of-concept approval to live yen-pegged stablecoin transactions by the end of Japan's fiscal year 2026, which closes March 31, 2027.

MUFG Bank, Mizuho Bank, and Sumitomo Mitsui Banking Corporation (SMBC) collectively hold roughly $6.8 trillion in assets and serve more than 300,000 major corporate clients across Japan. The initiative, widely referred to as Project Pax, has formal regulatory approval from Japan's Financial Services Agency and runs on Progmat, a blockchain infrastructure platform originally spun out of MUFG in partnership with NTT Data and regional Japanese banks.

What the Banks Are Building

The three institutions have established a joint governance council to define operational frameworks, governance rules, and compliance structures for shared stablecoin issuance.

Rather than each bank running a separate token, the model calls for shared yen-pegged stablecoin issuance that corporate clients can use across counterparties.

Progmat supports four public blockchain networks: Ethereum, Polygon, Avalanche, and Cosmos. That multichain design is deliberate; it lets the stablecoin connect to existing enterprise blockchain networks and decentralized finance liquidity pools without forcing users onto a single proprietary chain.

The FSA formally approved the project on November 7, 2025, under its Payment Innovation Project, the eleventh initiative supported by the agency's FinTech Proof-of-Concept Hub.

That regulatory approval is significant because Japan's Payment Services Act, as amended in June 2023, restricts yen stablecoin issuance to three categories of licensed entity: banks, fund-transfer service providers, and trust companies. All issuers must hold 100 percent reserves and guarantee on-demand redemption at face value.

A further amendment to cabinet ordinances, which took full effect June 13, 2026 (three days after this story broke), allows issuers to back up to half of their reserves with short-term Japanese government bonds of no more than three months in maturity, or early-cancellable term deposits, rather than pure demand deposits.

First Enterprise User and Volume Targets

Mitsubishi Corporation has been confirmed as the first enterprise to commit to the network, with plans to use the stablecoin across more than 200 global subsidiaries. Given Mitsubishi's footprint across South and Southeast Asia, those subsidiaries represent an early real-world testing ground for cross-border yen stablecoin flows outside Japan.

The consortium has set a B2B settlement volume target of roughly one trillion yen (approximately $6.5 to $6.8 billion) by 2028.

A US dollar integration is planned for late 2026, though the precise structure of that integration has not been publicly specified by the consortium. Depending on its form, it could place bank-backed dollar settlement capacity from G7 institutions on the same public chains as USDC and Tether.

Where This Fits in the Global Stablecoin Market

The global stablecoin market currently sits at roughly $270 to $300 billion in total supply, according to DeFiLlama data, with Tether's USDT and Circle's USDC together accounting for over 95 percent of outstanding tokens. Annual stablecoin settlement volumes now exceed $18 trillion, surpassing Visa and Mastercard combined. Citigroup's revised 2030 forecast places the market's base case at $1.9 trillion and its bull case at $4.0 trillion, driven by accelerating institutional adoption and legislative clarity such as the US GENIUS Act.

Japan already has FSA-licensed yen stablecoin entrants on public chains: JPYC received its fund-transfer service-provider licence in 2025 and operates across Ethereum, Avalanche, and Polygon, while SBI and Startale's JPYSC, a trust-bank-backed yen stablecoin, was expected to launch in mid-2026. The megabank consortium's contribution, once Phase 1 is live, would be the first bank-consortium yen stablecoin at institutional scale, distinguished by the joint governance structure and the volume of corporate counterparties involved, not by being the first yen stablecoin on public chains.

What It Means for South Asia and Africa

The practical benefit for individual users in South Asia will not arrive immediately. Phase 1 is strictly business-to-business; there are no retail consumer wallets in the initial rollout. Japan hosts around 800,000 foreign workers, including large populations from Nepal, Vietnam, Indonesia, the Philippines, and, to a lesser extent, Bangladesh and India.

Those workers currently pay 5 to 8 percent in fees on SWIFT-based remittances, compared to 0.5 to 1.5 percent for existing stablecoin corridors that include on- and off-ramp costs. The Philippines corridor alone accounts for roughly $38 billion in annual remittances, with Japan among the top source countries.

For South Asian workers to access cheaper transfers through this network, FSA-licensed retail intermediaries will need to build consumer-facing products on top of Progmat rails. That licensing and buildout process could push retail access to 2028 or later.

For Africa, the impact is less direct but still worth tracking. Africa leads global stablecoin ownership among crypto-active users at 79 percent, ahead of other emerging markets (roughly 60 percent) and high-income countries (roughly 45 percent), according to a March 2026 report from Further Africa. Currently 99 percent of that activity runs through dollar stablecoins.

A regulated, fully reserved yen stablecoin from three of the world's largest banks on Ethereum, Polygon, Avalanche, and Cosmos gives African central banks and fintech developers a concrete compliance model for building local bank-backed alternatives to dollar-denominated tokens. Uganda's ongoing CBDC pilot, linked to a $5.5 billion real-world asset tokenization initiative, illustrates how closely African policymakers are monitoring infrastructure models like Progmat. S&P Global has flagged that widespread foreign stablecoin adoption can displace local currency demand, a concern that makes the Japanese regulatory architecture particularly relevant for African policymakers weighing their own frameworks.

What Comes Next

Japan's ruling Liberal Democratic Party blockchain panel has stated explicitly that yen stablecoins should serve as a tool for expanding Japan's monetary influence across Asian cross-border payments, framing the project as strategic infrastructure rather than a fintech experiment.

The USD integration planned for late 2026, if it launches on schedule and takes the form of a new instrument, will be an early test of whether bank-backed dollar settlement capacity can reach institutional corridors in emerging markets currently served by Tether and USDC. Progmat is simultaneously being tested for T+0 settlement of Japanese government bond tokenization, with a 2026 target, giving a fuller picture of the scale of what the platform is being asked to deliver across Japan's financial system.

For developers building on Ethereum, Polygon, Avalanche, or Cosmos in South Asia or Africa, the Progmat architecture is now a live compliance reference. Integration requires strict KYC/AML compliance interfaces, and the initial developer opportunity lies in enterprise treasury management and supply chain settlement tools rather than consumer wallets. The business case for broader integration sharpens considerably once the retail phase begins.