Japan Open Chain (JOC), an Ethereum-compatible Layer 1 blockchain operated by a consortium of Japanese companies, is set to issue eJPY (a product name reported in industry coverage and pending official confirmation from GUGroup or the Japan Blockchain Foundation), a stablecoin pegged to the Japanese yen and designed for B2B settlement. The launch comes as Japan's amended Payment Services Act reaches full enforcement on June 13, 2026, completing the rollout of a regulatory framework that has been progressively in force since the PSA amendment was enacted in June 2025. Japan's first FSA-approved yen stablecoin was already issued under the framework in October 2025, and June 13 brings all Cabinet orders and FSA ordinances into full effect. The stablecoin will be available on both JOC and Ethereum mainnet.

A consortium chain, not a startup product

Japan Open Chain is not a startup project. Its 16 validator nodes are run exclusively by named Japanese corporations, including Dentsu Inc., NTT Communications, a Sony Group subsidiary called CORGEAR, pixiv Inc., TIS Inc., and Minna no Bank, among others. The network uses Proof of Authority (PoA) consensus, a model where a defined set of approved organizations validate transactions rather than anonymous miners or stakers. This design trades decentralization for predictable performance and regulatory accountability. JOC processes approximately 400 transactions per second for ERC-20 token transactions and approximately 2,000 transactions per second for simple transfers, compared to approximately 15 TPS on Ethereum mainnet, and targets a transaction fee below one yen per transaction.

The stablecoin issuance platform, called GU Coin Studio, is operated by G.U. Technologies, the primary technical developer behind JOC. The company raised approximately 420 million yen (around $2.9 million USD) in December 2023, with B Dash Ventures serving as lead backer and additional overseas investors participating via token sales. Five banks have already participated in stablecoin pilots on the network: Minna no Bank, Tokyo Kiraboshi Financial Group, The Shikoku Bank, Aozora Bank, and ORIX Bank.

Where eJPY fits in Japan's stablecoin landscape

Japan now has at least three distinct yen stablecoin efforts at various stages of development, each targeting a different segment of the market. JPYC, issued by JPYC Co. and the first product to receive FSA approval under the new framework (in October 2025), reported cumulative issuance above 1.3 billion yen as of January 2026, with roughly 69 percent monthly growth. It runs on Ethereum, Avalanche, and Polygon and is aimed at a broader user base. JPYSC, announced in February 2026 by SBI Holdings and Startale Group and issued by Shinsei Trust and Banking, a subsidiary of SBI Shinsei Bank, is targeting institutional treasury operations and cross-border settlement under a trust structure.

A fourth significant parallel effort is Project Pax, led by MUFG, SMBC, and Mizuho, Japan's three largest and most systemically important banks. Project Pax integrates stablecoins with SWIFT messaging on the Progmat DLT network, and its involvement of major regulated financial institutions makes it a directly relevant competitive reference point for any enterprise stablecoin entering the Japanese market.

eJPY on JOC occupies a distinct category: a consortium-backed, enterprise-grade instrument for corporate payments on a chain where the validators are identifiable, regulated Japanese businesses. As DL News reported, citing industry analysts, Japan's model is producing something closer to "digital bank money" than crypto-native tokens, with the emphasis on interbank and corporate settlement rather than retail access.

What this means for payments outside Japan

The implications extend well beyond Japanese borders. Japan hosts more than 400,000 South Asian migrant workers, based on 2024 estimates, and international remittance costs to South Asian corridors frequently exceed 8 to 10 percent per transaction through traditional banking channels, according to World Bank data. A regulated yen stablecoin settling on a public, EVM-compatible blockchain at sub-yen fees and finality in under three minutes creates a potential low-cost alternative for those payment corridors, though eJPY's initial B2B focus means direct retail remittance access is not immediate.

For B2B use, the calculus is more straightforward. Standard international wire transfers carry total costs of 2 to 7 percent; stablecoin-based settlement has been documented at below 0.5 percent with finality in under three minutes. Indian technology and outsourcing firms with Japanese corporate clients represent one illustrative example of companies that face real invoice settlement friction today that this infrastructure could reduce, though this is offered as analytical inference rather than a documented case study.

Africa is another region where eJPY's architecture carries practical relevance. Sub-Saharan Africa's remittance corridors rank among the most expensive in the world, according to World Bank data, and Japan serves as a significant official development assistance donor and trade partner for multiple African nations. Stablecoin use in East Africa-Asia supply chain trade has already been documented, with blockchain-based settlement reducing costs along corridors where traditional correspondent banking remains slow and expensive. JOC's EVM compatibility is a meaningful advantage here: African developers building cross-border payment applications can integrate with JOC's infrastructure using tooling already standard across the Ethereum ecosystem, lowering the barrier to adoption without requiring entirely new technical foundations.

In February 2026, JOC announced a three-way partnership with MOIN, a Korean payments network, and Bifrost, a cross-chain infrastructure provider, to build a multi-currency stablecoin framework covering Korean won, yen, and euro, with explicit cross-chain interoperability goals. "The partnership will establish a regulatory-compliant multi-currency stablecoin issuance framework and ensure seamless cross-chain interoperability to realize safe and efficient cross-border financial infrastructure," the three organizations said in a joint statement. For developers building payment applications across Asia and Africa, JOC's use of LayerZero for cross-chain messaging and SubQuery for data indexing means the infrastructure supporting eJPY is built with cross-chain portability in mind.

What to watch

Japan's yen stablecoin market is projected to surpass $50 million in total value by the end of 2026, roughly five times its current size, according to DL News. The June 13 PSA enforcement date marks full regulatory operability for Japan's stablecoin framework, completing the final implementation of Cabinet orders and FSA ordinances that have been rolling out since the PSA amendment was enacted in June 2025. Compliant stablecoin issuance has been legally operative since before this date, as demonstrated by JPYC's FSA approval in October 2025, so June 13 closes a multi-year regulatory buildout rather than opening a previously closed legal window. eJPY's timing positions it as an early product under the fully operative rules, with JOC's existing banking relationships and validator infrastructure already in place. Whether the consortium model scales beyond Japan's borders, and how it integrates with broader DeFi infrastructure via LayerZero, will determine how much of that projected growth eJPY captures.