The Programmable Yen: Inside Japan's Three-Lane Stablecoin Stack Going Live in 2026

When Masaaki Taira — former Minister for Digital Affairs and now acting chair of the LDP’s new AI × On-Chain Finance Project Team — told a Tech for Impact Summit audience in April 2026 that “AI can’t have a bank account, so it’s stablecoins,” he was not speculating. He was describing the rails that had already been laid.

Three weeks before he took the stage, Japan’s three megabanks — MUFG, SMBC, and Mizuho — received regulatory clearance to begin issuing a joint yen-pegged stablecoin from March 2026 under Project Pax, targeting one trillion yen (roughly $6.5 billion) in circulation by 2028. Six months before that, on October 27, 2025, the privately held issuer JPYC had begun the first regulated, fund-transfer-licensed yen stablecoin in the country’s history. And by Q2 2026, SBI Shinsei Trust Bank is expected to launch JPYSC — Japan’s first trust-bank-backed yen stablecoin — in coordination with SBI Holdings and Startale Group.

Stand back, and the pattern is unmistakable. Japan has built — and is now activating — all three legal lanes for stablecoin issuance that its 2023 Payment Services Act amendment permits. No other major economy has done this.

The Three-Lane Architecture

On June 1, 2023, amendments to Japan’s Payment Services Act came into force and introduced a new legal category: the electronic payment instrument (EPI), defined under Article 2, paragraph 5. The drafting choice — separate from cryptoassets, separate from electronic money, separate from CBDC — created a clean regulatory home for fiat-pegged stablecoins.

Under the Financial Services Agency framework, digital-money-type stablecoins may be issued by exactly three classes of licensed domestic entities: banks, fund-transfer service providers, and trust companies. Algorithmic and crypto-collateralised “stablecoins” do not qualify and remain regulated as cryptoassets. Every issuer must hold 100% reserves, guarantee on-demand redemption at par, and report continuously to the FSA.

What looked at the time like a narrow rulebook was, in retrospect, a deliberate three-lane runway. Three years later, each lane has a flagship vehicle either already in flight or cleared for take-off.

Lane 1 — Banks: Progmat and Project Pax

The bank-issued lane is the heaviest. It is also the most concrete.

Progmat, a digital-asset infrastructure platform spun out of MUFG in partnership with NTT Data and several regional banks, operates the underlying ledger. MUFG, SMBC, and Mizuho have built Project Pax on top of it together with the blockchain middleware firm Datachain. The technical design is deliberately invisible to corporate users: clients initiate payments through the same SWIFT-compatible banking dashboards they already use, and the megabanks intercept the call on the back end, routing settlement across Ethereum, Polygon, Avalanche, and Cosmos via stablecoin smart contracts.

The economic addressable market behind that interface is roughly 300,000 corporate clients across the three megabanks, per industry reporting on the platform’s reach. Mitsubishi Corporation has already begun using Progmat-issued stablecoins to settle intra-group flows between its Tokyo headquarters and overseas subsidiaries — a real first-mover case, not a sandbox.

The March 2026 limited launch window was timed to Japan’s fiscal year-end deliberately: it aligns the rollout with corporate planning cycles for FY2026. US-dollar integration is slated for late 2026. The 2028 issuance target — one trillion yen across the three banks combined — is the institutional benchmark by which the entire framework will be judged.

Lane 2 — Fund-Transfer Service: JPYC

The fund-transfer lane is the most public-facing.

JPYC issued the first regulated yen stablecoin in Japan on October 27, 2025, under a fund-transfer service-provider licence. In April 2026, the FSA formally designated JPYC as a money transfer service provider under the same legal supervision regime that governs PayPay and Rakuten Pay — a primary-source confirmation that the rails are now squarely inside Japan’s mainstream payments perimeter, not an experimental crypto cul-de-sac.

The fund-transfer category itself is tiered by the per-transaction value of the transfer. Under the Payment Services Act, money transfer businesses are classified into three subtypes: Type 1 (no upper limit, requiring full permission), Type 2 (up to ¥1 million per transaction, requiring registration), and Type 3 (up to ¥50,000 per transaction, requiring registration). The structure was originally drawn for human payments. It now also defines the ceiling within which a fund-transfer-licensed stablecoin can move value per call — a constraint that shapes everything from retail payments to programmatic micropayments by software agents.

JPYC’s appeal in this lane is exactly that it is not a bank. It is closer in shape to a tech-native issuer that has accepted bank-grade obligations: 100% backing, redemption guarantees, FSA reporting. It is the closest analogue Japan has to Circle’s USDC — except entirely yen-denominated, issued under Japanese law, and supervised under the same statute as the country’s largest e-money apps.

Lane 3 — Trust Banks: JPYSC

The trust-bank lane is the newest, and the one most aligned with institutional capital markets.

JPYSC is being issued by SBI Shinsei Trust Bank, in coordination with SBI Holdings and Sota Watanabe’s Startale Group, with a launch targeted for Q2 2026. The structural difference from a bank-issued stablecoin is meaningful: trust-issued EPIs sit inside a trust account, segregated from the issuer’s balance sheet by law, which gives institutional treasurers a cleaner bankruptcy-remoteness story for large balances than a deposit-equivalent claim on a megabank.

That is not a marketing distinction. For corporate treasury, sovereign-wealth allocations, and AI-agent-controlled custodial reserves, the legal status of the asset at issuer default is the gating question. Japan’s trust-bank lane is, in effect, the country’s answer to that question — and the only one of its kind among major economies.

The Foreign-Currency Window: USDC in Japan

While the yen lanes were being built, the FSA also opened a regulated entry point for foreign-currency stablecoins.

On March 4, 2025, SBI VC Trade became the first exchange approved to handle Circle’s USDC under the revamped Payment Services Act, with trading commencing March 26. Circle launched a local subsidiary, Circle Japan KK, and a joint venture with SBI Holdings. By the second half of 2025, SBI VC Trade had layered a retail USDC lending product on top — extending the rails from settlement into yield. USDC is now legally cleared inside Japan as a non-yen, non-bank stablecoin, completing the picture: Japanese corporates can pay each other in regulated programmable yen, and Japanese retail and institutional users can hold regulated programmable dollars at the same compliance grade.

Why Agentic AI Converges Here

The strategic implication of all this is the point Taira was making in April. Autonomous AI agents cannot hold bank accounts — they fail the personhood test that underpins KYC, account opening, and beneficial-ownership disclosure. They can, however, hold and transact in EPIs through smart-contract wallets governed by their human or corporate principals.

That is a slightly mundane technical observation. The strategic observation is that the jurisdiction whose stablecoins are most fully integrated into existing institutional banking, corporate treasury, and legal redemption infrastructure becomes the natural settlement layer for agentic commerce. Japan now has three regulated issuance lanes spanning megabanks, fund-transfer fintechs, and trust banks; SWIFT-compatible corporate dashboards on top of Progmat; bankruptcy-remote trust structures via JPYSC; and a foreign-currency window for USDC. The bet Taira and the LDP’s new On-Chain Finance Project Team are placing is that this stack — not a unified EU rulebook, not a state-by-state US patchwork — is what enterprise-scale AI-to-AI value transfer will settle on by 2027–2028.

What 2026 Unlocks

For corporate strategy teams watching from Tokyo, London, New York, and Singapore, three things shift this year. Cross-border trade-finance settlement between Japanese megabanks and their emerging-market counterparties moves on-chain inside the Project Pax pilot. JPYSC creates the first trust-isolated yen treasury reserve asset that institutional allocators can hold with the same legal certainty as a custodied security. And JPYC, now formally a money transfer service provider, becomes a candidate rail for high-frequency, low-value programmatic flows — the exact shape of activity software agents will generate at scale.

The infrastructure question for the next eighteen months is no longer whether regulated yen stablecoins exist. It is which institutions choose to clear their first transaction on each lane — and on what timeline the rest of the global financial system follows them onto Japanese rails.

These are the conversations that will define the agenda for Tech for Impact Summit 2027 next May in Tokyo. If you are building, funding, or governing the on-chain financial stack that the next wave of agentic AI will run on, this is the room. Invitations for our partner and speaker cohort are open now — start a conversation with the T4IS team.