The Future of JGB Collateral Settlement: JSCC, Mizuho, and Nomura’s Innovative Trial

In a groundbreaking move, Japan Securities Clearing Corporation (JSCC), Mizuho, and Nomura have initiated a Proof of Concept (PoC) on April 20, 2026, to explore the possibilities of utilizing JGB digital collateral on the Canton Network. This joint venture, supported by the Japan Financial Services Agency (JFSA), aims to enable 24/7 real-time cross-border collateral settlement, revolutionizing the traditional business-hours processing system.

The PoC, scheduled to run until September 2026, holds significant implications for regulatory reforms and the potential commercialization of onchain JGB collateral.

Collaboration with Digital Asset Holdings

Expanding their partnership, JSCC, Mizuho, and Nomura have welcomed Digital Asset Holdings as the fourth participant in this initiative. Digital Asset brings its cutting-edge Canton Network platform, tailored for institutional finance, to the table. The trial period, set to conclude around the end of September 2026, marks a significant milestone in Japan’s Payment Innovation Project backed by the FSA.

This strategic move aligns with Japan’s overarching objective of modernizing financial market infrastructure through distributed ledger technology.

Exploring Legal Implications and Real-Time Transactions

The core focus of the PoC revolves around testing the seamless transfer of rights in JGBs, as per Japan’s Act on Book-Entry Transfer of Corporate Bonds and Shares, on a blockchain framework without compromising their legal validity under existing Japanese legislation. Additionally, participants aim to ascertain the feasibility of real-time updates to book-entry transfer records within a multi-institutional account structure.

By transitioning JGB collateral posting and substitution to a 24/7 operational model, the partners aspire to streamline domestic and cross-border transactions across clearing houses, institutional investors, clients, and agents.

Leadership and Technological Advancements

Under the guidance of key industry leaders like Isao Hasegawa, Masahiro Kihara, Kentaro Okuda, and Yuval Rooz, the collaboration leverages the sophisticated capabilities of the Canton Network to facilitate privacy-preserving settlement functions tailored for institutional requirements. This approach addresses the compliance challenges faced by major financial institutions in handling sovereign debt instruments effectively.

Japan’s financial regulatory bodies have closely monitored developments in the U.S., particularly initiatives by the Depository Trust and Clearing Corporation (DTCC) exploring tokenized collateral applications on the Canton Network for U.S. Treasuries. JSCC’s involvement in DTCC’s Digital Launchpad sandbox in 2024 underscores the collaborative efforts in researching and implementing innovative solutions for the financial sector.

Future Prospects and Operational Benefits

Anticipated operational advantages include reduced administrative costs associated with collateral management, streamlined processes for posting and substitution workflows, and enhanced coordination between JGBs and digital-native assets within institutional portfolios. The outcomes of the PoC will inform potential regulatory adjustments, system enhancements, and policy modifications required for any future commercial deployment.

While a specific commercial launch date remains undetermined, Mizuho and Nomura’s participation in other JFSA Payment Innovation Project initiatives, such as a stablecoin-based securities settlement pilot, reflects the ongoing commitment of Japan’s major financial institutions to explore blockchain applications under regulatory guidance simultaneously.

This transformative trial signifies a significant advancement in onchain government bond collateral management, providing a glimpse into the future of financial market operations in Japan.