Japan’s central bank has stress-tested its digital yen pilot at 50, 000 operations per second, but the country still hasn’t decided whether it wants a CBDC at all.
- 50, 000 TPS in a mixed test workload
- 10, 000 payments plus 40, 000 balance checks
- No fatal technical barrier found so far
- Stablecoins, tokenized deposits, and DLT are now part of the BOJ’s wider focus
The Bank of Japan’s latest progress report, published on September 11, 2026 by its Payment and Settlement Systems Department, shows a pilot that is no longer just a concept on a slide deck. In testing, the system handled a mixed workload of 10, 000 payment transactions and 40, 000 balance inquiries per second, totaling 50, 000 operations per second.
That distinction matters. This was not 50, 000 money-moving payments per second. It was a combined test of payments and balance checks, which are much cheaper to process. Still, for a central bank pilot, that is serious throughput, not vaporware, not marketing sludge, and definitely not something you build by accident.
But the bigger fact is still the awkward one: Japan has not decided to issue a CBDC. The BOJ says the decision to issue a digital yen “should be made through public discussions, ” and it gives no timeline. So yes, the pilot is getting more capable. No, that does not mean a digital yen is around the corner.
For readers new to the term, a CBDC is a central bank digital currency, digital money issued by a central bank. In Japan’s case, that would be a digital yen. The idea has been under study for years, but study and deployment are two very different beasts.
The pilot began in April 2023 after two years of proofs of concept. The latest report is more useful than earlier updates because it puts hard numbers on performance instead of just describing architecture. And those numbers show both the promise and the friction.
Without special handling, the pilot system managed only around 50 to 100 transactions per second per account before record locking became a bottleneck. Record locking is a database issue: when too many requests try to update the same account at once, the system slows down because it has to keep the data consistent.
The BOJ then tried record splitting, which breaks one account’s balance into multiple records so transactions can be processed in parallel. With that approach, throughput on a single account rose to 6, 000 transactions per second. Desktop analysis suggested that splitting each account into 600 records could reach 18, 500 TPS.
The BOJ is also tentatively designing for 500, 000 TPS in “social implementation, ” including 100, 000 actual payment transactions. In plain English, that means real-world rollout scenarios rather than a lab demo. The report says no “technical knockout factor (fatal and insoluble factor)” was found that would block scaling to that level.
That is a careful way of saying the engineering problem is hard, but not obviously impossible. A production CBDC would still need multiple distributed ledgers, error handling, backup sites, and endpoint devices for users ranging from smartphone owners to the cash-only crowd. Money infrastructure does not get to crash because someone’s phone battery died.
The BOJ’s next technical focus is the ledger management system, the core software that keeps balances accurate and transactions in order. That is the boring part that decides whether the whole thing works. Payments systems are full of glamour like that.
There is also a policy question hovering over all of this: why build a retail CBDC if the market is already moving? Japan’s CBDC Forum, which has met 84 times since 2023 and includes 64 private-sector firms, is being reorganized from seven working groups into three discussion groups. Those groups are CBDC architecture, the CBDC ecosystem, and new technologies.
That last bucket is the most revealing. It now includes stablecoins, tokenized deposits, DLT-related technologies, asset tokenization, and programmability. That is not a minor bureaucratic tidy-up. It suggests the BOJ is thinking less in terms of “CBDC only” and more in terms of a broader digital money stack.
DLT, or distributed ledger technology, means a ledger shared across multiple nodes rather than sitting in one central database. Tokenized deposits are bank deposits represented as digital tokens that can move on a ledger. Asset tokenization turns ownership rights in assets into digital tokens. And programmability means money can carry rules, for example, settlement conditions or automated transfers.
In other words, Japan is not just asking whether to build a digital yen. It is asking what kind of rails it wants for money, deposits, and settlement in a world where private actors are already building alternatives.
That brings us to JPYC, Japan’s first regulated yen-denominated stablecoin, which launched in October 2025. It is already being used for payroll by a logistics firm paying around 2, 300 delivery drivers. That is the kind of mundane, high-signal use case that matters. Not hype. Not moon-boy theater. Just wages moving where they need to go.
Japan’s regulators appear to be responding to that reality. In August, the Financial Services Agency scrapped the 1 million yen per-transaction cap on stablecoin operators and set up a dedicated stablecoin division. In June, the ruling LDP’s blockchain panel urged the government to promote yen stablecoins for settlement across Asia.
That matters because it changes the competitive picture. If regulated yen stablecoins can already support payroll and cross-border settlement ambitions, what problem would a retail digital yen solve that people actually feel in daily life? Lower fees? Better settlement finality? State backing? Or just the comforting knowledge that the central bank is still holding the steering wheel?
That last point is not trivial. A retail CBDC raises real concerns around privacy, surveillance, and bank disintermediation. If citizens start moving money directly into a state-issued wallet, commercial banks can lose deposits. If every transaction looks too visible to the state, users may quite reasonably ask whether “digital cash” is actually cash at all.
Those concerns are why CBDCs are not just an engineering exercise. They are a political and social decision wrapped around a technical one. A central bank can build a fast ledger and still face public resistance if people think the trade-offs are lousy. And in a cash-friendly country like Japan, adoption would not be automatic just because the software looks competent.
That is where private-sector rails get uncomfortable for the CBDC crowd. Japan already has bank transfers, cash, and widely used payment apps such as PayPay. A digital yen would need a very clear reason to exist beside them, not just above-average throughput and a patriotic logo.
The source also points to BSV blockchain’s Teranode software, publicly released in 2025, which it says sustained over 1 million TPS for two weeks straight on a globally distributed test network of competing nodes, with AWS documenting the test infrastructure. Whether one finds that compelling or not, the point is simple: high throughput is not unique to central-bank or permissioned systems. The “only we can scale” line is tired nonsense.
And balance inquiries, as the source notes, barely register as a cost in that framing. That does not make public blockchains the answer to everything, because they are not. But it does remind everyone that TPS numbers are easy to weaponize and easy to misunderstand. Architecture, latency, governance, reliability, and user experience matter just as much.
The BOJ’s work shows Japan is being methodical rather than reckless. That is sensible. A national money system should not be rushed by online enthusiasm or by crypto’s usual habit of selling future perfection today and accountability tomorrow.
Still, the tension is obvious. The BOJ can build a technically credible digital yen path. The private sector is already building digital yen-like products with real users. One side has monetary authority. The other side has actual market pull. That is a fight central banks do not always win on user convenience alone.
The next progress report will come in due course. By then, the most interesting question may be less about whether Japan can scale a digital yen, and more about whether anyone still needs one once stablecoins and tokenized settlement rails keep taking over the obvious use cases.
Key questions and takeaways
-
Did the BOJ prove the digital yen can handle 50, 000 payments per second?
No. The test handled 50, 000 operations per second in a mixed workload, made up of 10, 000 payment transactions and 40, 000 balance inquiries. -
Has Japan decided to launch a CBDC?
Not yet. The BOJ says the decision should come through public discussion and has given no launch timeline. -
What is the main technical bottleneck?
Record locking on shared accounts. The BOJ tested record splitting to improve throughput, but real-world production scaling still needs more work. -
Why are stablecoins suddenly part of the BOJ’s discussion?
Because private digital money is already advancing. Japan’s forum now includes stablecoins, tokenized deposits, and other digital finance tools, not just CBDC design. -
Why does JPYC matter?
It gives Japan a regulated yen stablecoin with real use, including payroll for around 2, 300 delivery drivers. That makes the CBDC debate less theoretical. -
What is the biggest unresolved issue?
Whether a digital yen would offer enough practical value to beat cash, bank transfers, payment apps, and regulated stablecoins, especially once privacy and bank-disintermediation risks are factored in.
Further reading
A useful side angle on how policy shocks can push people toward harder money and stablecoins:
