Japan’s top financial institutions are stepping firmly onto the blockchain. The Japan Securities Clearing Corporation (JSCC), a subsidiary of Japan Exchange Group (JPX), has launched a proof-of-concept (PoC) trial with Mizuho Financial Group, Nomura Holdings, and Digital Asset to test the use of Japanese government bonds (JGBs) as on-chain digital collateral via the Canton Network, a distributed ledger platform designed exclusively for institutional finance.
What the Trial Actually Tests
Announced Monday through a joint press release, the PoC will determine whether JGBs can be transferred and managed on-chain while retaining their legal standing under Japan’s Book-Entry Transfer Act and the Financial Instruments and Exchange Act. That legal question is the central challenge: any live deployment would require full compliance with the frameworks that currently govern Japan’s sovereign debt market.
The trial will also test whether integrating existing clearing systems with Canton’s infrastructure can enable real-time, 24/7 collateral transactions, a meaningful operational improvement over a current setup limited by business hours and manual processes. Cross-border use cases are also within scope, covering flows between clearing houses, institutional investors, and agents across domestic and international markets.
The FSA Is Directly Involved
This is not a private industry experiment. Japan’s Financial Services Agency (FSA) selected the initiative in February under its Payment Innovation Project, which operates inside the country’s broader FinTech PoC Hub. Regulatory backing places the trial within a formal, government-supervised framework. The participating firms said achieving digital collateral management for JGBs has become an “urgent priority,” citing rapid momentum in the United States and other overseas markets.
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The Hack That Accelerated Japan’s Urgency
Japan’s push toward secure, compliant digital financial infrastructure did not happen in isolation, it was partly forged by crisis. In May 2024, Japanese cryptocurrency exchange DMM Bitcoin suffered one of the largest crypto hacks in history. Hackers made off with 4,502.9 BTC, worth approximately $308 million at the time. The FBI, the U.S. Department of Defense Cyber Crime Center, and Japan’s National Police Agency jointly attributed the attack to TraderTraitor, a North Korean state-sponsored group also known as Jade Sleet and Slow Pisces.
The attack started in March 2024 when a North Korean actor masquerading as a LinkedIn recruiter reached out to Ginco, an enterprise cryptocurrency wallet software firm in Japan. An employee uploaded a malicious Python program that allowed the hackers to access Ginco’s unencrypted communications system. The attackers managed to use the access they obtained in May end to hijack a legitimate transaction being carried out by a DMM employee. Furthermore, they redirected it such that a total of 4,502.9 BTC worth was sent to wallets under their control.
To avert a liquidity crisis, DMM Bitcoin suspension withdrawals and new account openings before shutting down entirely, in a spectacular collapse that will take its place among Japan’s biggest. A formal investigation was launched by FSA which indicated serious shortcomings in the DMM system risk management. This regulatory intervention speeded up Japan’s institutional push to develop legal, secure blockchain infrastructure. The group’s email security provider was attacked in April 2025, resulting in fear of data leaks. The group resolved the incident. Therefore, it was confirmed that there was no loss of data from JPX’s side.
A Global Race to Tokenize Sovereign Debt
The JGB trial positions Japan alongside a growing roster of nations racing to bring sovereign bonds on-chain. In the United States, the Depository Trust & Clearing Corporation (DTCC) has already piloted U.S. Treasury securities on the Canton Network. A December 2025 Canton test saw tokenized Treasuries reused as real-time collateral by institutions including Bank of America and Société Générale.
The JSCC-DTCC connection is deeper than it appears: when the DTCC launched its DTCC Digital Launchpad sandbox in 2024, JSCC was its first adopter, for this exact collateral use case. South Korea is moving in parallel, with Ripple partnering Kyobo Life Insurance on tokenized bond transactions and the country’s Ministry of Finance piloting blockchain-based deposit tokens. In February 2026, the UK appointed HSBC’s Orion platform for its Digital Gilt Instrument pilot inside the Bank of England‘s Digital Securities Sandbox.
Why JGBs Matter, and What Comes Next
JGBs are among the most widely accepted forms of institutional collateral in the world. Japan operates one of the largest sovereign bond markets globally, making any successful digital framework for JGBs significant well beyond Japan’s own financial system. If the PoC succeeds, it could enable JGBs to interact directly with digital-native assets, create new types of financial transactions, and substantially reduce the administrative burden of collateral posting and substitution for institutions and investors alike.
No commercial deployment timeline has been announced. The trial’s outcome will inform discussions on whether current laws require amendment before any live implementation. For the Canton Network, Japan’s entry marks the addition of a systemically important sovereign bond market to an institutional partnership list that keeps expanding.
