Japan's bond market will go fully "on-chain"

Original Author: Vaidik Mandloi

Compilation & Organization: BitpushNews

One Saturday in August 2025, something happened that should have set every crypto group on the internet ablaze. Bank of America, Citadel Securities, the Depository Trust & Clearing Corporation (DTCC), and Société Générale settled a US Treasury repo transaction on a blockchain over the weekend, in real-time.

For context, a repo is one of the most basic trades in institutional finance: one party sells government bonds to another, agreeing to buy them back the next day, typically to raise short-term overnight cash.

It's the "plumbing" of the financial system. Banks, hedge funds, and central banks use repos daily to manage liquidity, with trillions of dollars flowing through this market. This was the first time ever that such a transaction was settled near-instantly via atomic settlement on a blockchain, outside of market hours, with participants being some of the world's largest financial institutions.

Eight months later, on April 20, 2026, Japan's central clearing house JSCC, Mizuho Financial Group, Nomura Holdings, and Digital Asset launched a proof of concept (PoC) aimed at moving Japanese Government Bonds (JGBs) as collateral onto the Canton Network.

JGBs are one of Asia's most important financial instruments, with over $9 trillion in circulation value, making them the most widely used single collateral asset in the region's institutional market. When banks and hedge funds across Asia need to secure their leveraged positions, JGBs are often the first choice. Now, the entire collateral system is migrating on-chain.

This is arguably the most significant blockchain news of 2026.

This article analyzes why JGBs are the most suitable asset for initial tokenization, why the Canton Network continues to win institutional mandates while public chains compete for retail traffic, and how "24/7" collateral settlement is set to change global trading desks fundamentally.

Why JGBs? Why Now?

For decades, Japan has tried to make the Yen a global reserve currency, but this ambition has never truly materialized. Even today, the Yen accounts for only about 4-6% of global reserves, lagging behind the US Dollar, Euro, and even the British Pound.

But something unexpected happened along the way: Japanese Government Bonds became one of the fastest-growing collateral assets on Euroclear's Collateral Highway, the infrastructure for moving collateral among the world's largest financial institutions. Foreign holdings of JGBs have climbed to approximately 11.9%, meaning about 144 trillion Yen is held by institutions outside Japan.

In institutional finance, collateral is everything. Every leveraged position, every derivatives trade, every repo requires high-quality assets as backing. Backed by the world's third-largest economy and essentially risk-free in terms of default, JGBs qualify as one of the few such assets globally. When a hedge fund in Singapore builds a leveraged position or a bank in London covers derivatives exposure, JGBs are frequently used as collateral.

The most important infrastructure victory for crypto is happening *within* traditional finance. Even though Japan never "won" the currency war, JGBs have become the operational infrastructure for Asian institutional finance.

The problem is that the entire collateral system still operates as if it were 1995. A JGB collateral transfer between two institutions must pass through a multi-layered holding structure: at the top is the Bank of Japan (BOJ), then Hofuri (Japan's securities depository), followed by custodian banks, and then sub-custodians. Each layer requires separate reconciliation and only operates during Tokyo business hours (roughly 9:00 AM to 3:00 PM JST).

A collateral transfer that should take seconds ends up taking days *hours*. During those days, the collateral is effectively "frozen." A trading desk in New York needing to use it at 10:00 PM must wait for Tokyo to wake up. A study by the Global Financial Markets Association (GFMA) and Boston Consulting Group (BCG) estimates that blockchain could unlock $100 billion in trapped collateral globally; for a bank with a daily repo volume of $100 billion, tokenized settlement could save $150 million to $300 million annually in operational costs alone.

Here's something unsettling for Japan: The United States has already moved.

The DTCC, which holds custody of $99 trillion in US securities and processes $3.7 quadrillion in transactions annually, partnered with Digital Asset in December 2025 to tokenize US Treasuries on the Canton Network. This means the core of the US securities infrastructure is moving toward 24/7 tokenized settlement.

Broadridge is already processing $354 billion in tokenized Treasury repo transactions daily on the same network; JPMorgan's Kinexys has processed over $1.5 trillion in cumulative transaction volume through its on-chain payment rails. US Treasuries are rapidly becoming "always available, always movable" collateral assets, while JGBs remain locked within Tokyo's business hours.

If you're a global fund manager needing to post collateral for a margin call at 2:00 AM, given the choice between tokenized US Treasuries that settle instantly or JGBs that require waiting 6 hours for Tokyo to open, I believe you would choose Treasuries every time.

If this choice is replicated across thousands of trading desks, JGBs risk losing their "premier collateral" status. For a country whose sovereign bonds are deeply intertwined with Asia's financial collateral system, this borders on an existential issue. The four companies involved in the JGB on-chain trial used the word "urgent" in their press release. Given the pace of US infrastructure evolution, it's hard to disagree.

Why Canton Keeps Winning

When Japan's JSCC needed to choose a network for JGB collateral, they selected Canton—the same chain already used by DTCC, Broadridge, and JPMorgan. The reason lies in the extremely demanding requirements sovereign bond collateral places on a network.

Sovereign bond collateral has specific needs that most blockchains cannot meet. When Mizuho Bank transfers JGB collateral to a counterparty in London, the transaction must comply with Japan's Book-Entry Transfer Act. The blockchain record needs legal synchronization with Hofuri's official registry.

Each party in the transaction (from the clearing house to the custodian to the counterparty) can only see data authorized under Japanese and international securities laws. Furthermore, the entire process requires atomic settlement: the collateral and the payment must move at the exact same instant, or neither moves.

This is a set of exceptionally complex constraints. Canton was chosen because its architecture is designed to solve precisely these problems. Each institution runs its own ledger, and cross-institutional transactions only synchronize data that each party is authorized to see. Smart contracts, written using Digital Asset's Daml language, specify precisely who can see what and who must authorize each step.

Thus, when JSCC, Mizuho, and Nomura conduct a JGB collateral transfer on Canton, the clearing house sees the full picture, Mizuho sees its side, Nomura sees its side, and no one sees anything they shouldn't. Canton is now arguably the only network globally enabling the three major sovereign bond collateral pools (US, Japanese, and European) to move freely across borders, in real-time, 24/7. No other network, public or private, comes close to this capability.

What Does "24/7" Collateral Actually Change?

Most coverage of tokenized on-chain settlement stops at "it's faster." But speed is just the beginning; the real transformation lies in how the system behaves under stress.

Consider what happened during the COVID-19 pandemic in March 2020. Markets crashed, volatility soared, and initial margin requirements for stock futures jumped by 100% in a few weeks. Funds unable to meet margin calls were forced to sell assets to raise cash.

But selling assets in a falling market pushes prices down, triggering more margin calls, which forces more selling. This feedback loop is one of the most dangerous dynamics in finance, nearly breaking the system again during the UK LDI pension crisis in September 2022.

How does 24/7 tokenized settlement change this?

• Direct Pledging: Currently, when faced with a margin call, most funds must first sell assets for cash. With on-chain collateral, a fund can directly pledge JGBs or Treasuries to meet the requirement without needing to convert to cash first. The "forced selling loop" is weakened because fewer institutions are dumping assets into a falling market solely for liquidity.
• Solving the "Delivery vs. Payment" Problem: In a traditional repo, the cash lender sends funds first and receives collateral later. During this window, one party is exposed. Banks factor this "intraday exposure" into their haircuts and funding costs.
• Atomic Execution: Through on-chain atomic settlement, both legs of the transaction (collateral and cash) move in the same instant. Santander tested this in December 2024, executing a $50 million and €50 million intraday repo on JPMorgan's Kinexys, which was automatically unwound three hours later. Intraday repos, which once required complex third-party setups or committed credit lines, have become routine.

More significantly, during a Canton demonstration in January 2026, the London Stock Exchange Group (LSEG) introduced its Digital Settlement House (DiSH) into the transaction. DiSH uses tokenized commercial bank deposits as the cash leg, rather than stablecoins.

This is because banks won't use USDC to settle billion-dollar transactions—USDC is a private IOU, not "money good." DiSH tokens represent actual deposits at regulated banks and can be transferred on-chain 24/7. This solves the cash leg problem, the final piece of the puzzle for institutional adoption. Now, Japan plans to connect JGBs to this same infrastructure.

What This Means

If the JGB trial succeeds, and US Treasuries are already live, with European sovereign bonds also in demonstrations, then in my view, Canton is starting to look like the next SWIFT.

It is a single network becoming the default layer for moving the world's most important collateral across borders. Like SWIFT, once enough institutions join, exit becomes nearly impossible. Network effects compound. Each new class of sovereign bonds added benefits the existing participants and makes it harder for new competitors to emerge.

I think this is worth pondering. We in the crypto space have spent years debating decentralization, worrying about single points of failure, building systems where no single entity controls the trajectory. And now, the most historically significant blockchain deployments are converging on a single permissioned network managed by the same institutions that run global finance.

Is this good or bad? It depends on what you think the whole point is. If the goal is to increase capital market efficiency, reduce settlement risk, and unlock hundreds of billions in trapped collateral, it is working. If the goal is to diminish the power of existing financial institutions, it is doing precisely the opposite—the old gatekeepers are simply upgrading to more advanced infrastructure.

I don't think this makes the achievement any less important. Settling government bonds on a blockchain-based, 7x24, cross-border, atomic settlement system is a genuine upgrade to how global finance operates. But I do think it's worth being honest about *what kind* of upgrade this is—an efficiency revolution: the pipes have been rebuilt, but the plumbers are the same people.