Mitsubishi UFJ Financial Group has launched a proof-of-concept for settling Japanese government bond repo transactions on the Canton Network, a blockchain built for institutional finance, with the goal of replacing a settlement cycle of one day or longer with real-time, around-the-clock settlement. The test involves four MUFG companies working with Digital Asset, the firm behind Canton, and Progmat, the tokenization subsidiary MUFG co-founded with other Japanese banks.
The announcement, made in August and detailed in a joint press release, covers the plumbing that sits underneath one of the world’s largest bond markets. Japanese government bonds are the standard collateral for repo trades, the short-term borrowing and lending deals that keep funding markets running. Settling them currently takes a day or more through Japan’s book-entry system. MUFG wants the same trades to settle simultaneously, with the bond and the payment changing hands at the same moment on a shared ledger.
What the test actually covers
The proof-of-concept has two parts. The first is delivery-versus-payment settlement of JGBs against digital money, using either tokenized deposits or stablecoins. The second is the full repo lifecycle on-chain: the lending protocol built by Secured Finance AG automates the sequence from opening the trade through collateral management to repayment, replacing what is currently a chain of manual and semi-automated steps across several systems.
Legally, the JGBs stay book-entry transfer bonds. The book-entry register held by the account management institution would be updated in conjunction with the blockchain rather than replaced by it. That design choice matters: it keeps the test inside Japan’s existing legal framework instead of waiting for new legislation, which has been the slower path in other jurisdictions.
Mitsubishi UFJ Morgan Stanley Securities and MUFG Bank act as market participants in the test, with MUFG Bank and Mitsubishi UFJ Trust and Banking serving as account management institutions. Morgan Stanley, MUFG’s global strategic alliance partner, is named as a collaborator on further development.
Why repo is the entry point
Repo is where settlement speed translates directly into money. A bank that lends cash overnight against JGB collateral cannot reuse that collateral until settlement completes. Shortening the cycle from a day to minutes frees capital that is currently parked waiting for trades to finalize, and extends the usable trading window past the cut-off times of Japan’s traditional settlement infrastructure.
| Element | Current practice | MUFG on-chain test |
|---|---|---|
| Settlement cycle | 1 day or longer | Real-time, intraday |
| Trading window | Business hours only | 24/7 |
| Lifecycle steps | Manual and semi-automated | Automated via smart contracts |
| Payment leg | Central bank and commercial money | Tokenized deposits or stablecoins |
MUFG is not inventing the category. JPMorgan’s Kinexys network has run intraday US Treasury repo on blockchain since 2020, and European banks have expanded similar tests for government bond repo over the past two years. Commercial services for intraday US Treasury repo are already in operation. MUFG’s own release points to that precedent: Europe and the United States moved first, and the bank argues that JGBs, given their credit quality and liquidity, deserve the same treatment.
The Canton bet and what it commits MUFG to
Canton Network is a privacy-enabled blockchain designed for regulated institutions, originally built around Digital Asset’s Daml smart contract language. Its selling point for banks is control: participants can transact on a shared ledger while keeping transaction details visible only to the parties involved, which is how interbank markets actually work. Canton’s ecosystem has grown to include Goldman Sachs, BNP Paribas, Microsoft and others, with billions of dollars in tokenized assets settled on it.
MUFG has been building toward this for years. The bank issues security tokens backed by bonds and real estate, runs its own stablecoin and tokenized deposit experiments through Progmat, and has tested digital money settlement in other contexts. The repo test connects those threads: a tokenized bond, a tokenized payment leg, and a smart contract that binds them.
For Japan’s market specifically, the timing is not incidental. The Bank of Japan has been winding down decades of bond purchases, which means the JGB market is slowly returning to something resembling active trading after years in which the central bank absorbed a large share of issuance. A market with more participants and more turnover has more to gain from faster settlement, and more reason for banks to compete on infrastructure.
The hard part is not the technology
Every on-chain settlement project in banking eventually collides with the same questions, and MUFG’s release acknowledges them rather than dodging. The bank says it will engage in communication with relevant authorities as the test progresses, which in practice means the Financial Services Agency and the Bank of Japan will want to see how tokenized deposits behave in settlement before anything goes live. Whether a tokenized deposit held at MUFG Bank is acceptable payment to a counterparty at another institution is a question the technology cannot answer on its own.
Liquidity is the second question. Repo markets work because of deep networks of counterparties, and a settlement system only helps if the other side of the trade is on it too. MUFG’s release says the bank intends to work with a wide range of market participants in Japan and overseas, which is the polite way of saying the test is worth little until other dealers join.
No timeline for production rollout was given. Proof-of-concepts at major banks routinely run for a year or more before any commercial launch, and several never make it. The difference here is that the model has already been proven elsewhere: JPMorgan’s Treasury repo network has been settling real trades for years, so MUFG is following a working template rather than pioneering one. That lowers the technical risk and concentrates the remaining uncertainty in regulation and adoption, where Japanese finance moves at its own pace.