Bank of Japan to Test Blockchain Settlement for Interbank Reserves
The central bank will run sandbox experiments on distributed ledger technology for reserve deposits, marking an early step toward wholesale digital currency infrastructure.
The Bank of Japan announced on March 3, 2026 that it will conduct blockchain-based settlement experiments for the reserve deposits that commercial banks hold with the central bank. Governor Kazuo Ueda made the disclosure in a speech titled "The New Financial Ecosystem and the Role of Central Banks," framing the effort as technical experimentation within an existing BOJ sandbox program rather than a commitment to live deployment.
The initiative targets a foundational layer of Japan's financial plumbing: the interbank settlement system that moves money between commercial banks and the central bank. Specific use cases under examination include domestic interbank settlement, securities settlement, and testing how distributed ledger technology (DLT) systems can connect with Japan's existing financial infrastructure.
Why This Matters
The BOJ's stated rationale centers on two operational improvements. First, blockchain settlement could enable round-the-clock transaction finality, unlike the current system that operates only on weekdays within set windows. Second, the technology could reduce settlement gridlock during periods of financial stress, when timing bottlenecks in traditional systems can amplify liquidity risk.
Ueda was measured about the obstacles. "There are significant challenges: processing large numbers of transactions, ensuring settlement finality, managing legal/operational risks in smart contracts, and ensuring appropriate governance," he said in the speech. The governance challenge around smart contracts is particularly significant for jurisdictions that lack established legal frameworks for automated contract execution, including many markets in South Asia and Africa where the BOJ's experiment will be closely watched.
This is not the BOJ's first move into digital currency research. The bank has run a structured CBDC (central bank digital currency) program since April 2021, completing two proof-of-concept phases and launching a live pilot in February 2023. As of mid-2025, that pilot involved 64 private-sector companies across seven working groups.
In early February 2026, the BOJ formally expanded its research scope to include wholesale CBDC, meaning tokenized central bank money designed specifically for interbank use rather than retail consumers. The March 3 announcement extends that February pivot into a structured sandbox program; the two developments are related but distinct milestones. A retail digital yen remains officially undecided.
The Global Framework Behind the Experiment
Japan's sandbox does not operate in isolation. The BOJ is one of seven central banks participating in Project Agorá, a multilateral initiative coordinated by the Bank for International Settlements (BIS) and launched in April 2024. The project brings together more than 40 private financial institutions alongside the central banks of France, South Korea, Mexico, Switzerland, the United Kingdom, and the United States (Federal Reserve Bank of New York). The shared goal is a unified programmable ledger that can combine tokenized commercial bank deposits with wholesale central bank money to enable atomic cross-border settlement. Atomic settlement means all legs of a transaction complete simultaneously, eliminating the counterparty risk that exists when payments are processed in sequence.
Project Agorá entered its prototype phase in late 2025 and is expected to publish a Phase 1 report in the first half of 2026.
The BOJ's approach also draws inspiration from Europe's wholesale DLT settlement frameworks, which have been in active development for several years. That precedent means the BOJ is not constructing conceptual foundations from scratch but adapting models that European regulators have already stress-tested.
On the domestic side, Japan already has a live proof-of-concept for tokenized deposits. The DCJPY network, built by Progmat/DeCurret and backed by major Japanese banks, recorded roughly a 75% reduction in manual workload during a delivery-versus-payment test for security tokens. DCJPY has also signed a memorandum of understanding with Partior, a blockchain-based interbank settlement network, and SBI Shinsei Bank to extend connectivity across borders.
Regional Implications
For South Asia, the BOJ's direction carries direct relevance. India's Reserve Bank launched its own deposit tokenization pilot in October 2025, using comparable wholesale CBDC settlement mechanics. By 2025, India's e-Rupee retail pilot had reached 7 million users, a figure that illustrates the scale of the country's parallel digital currency ambitions. In January 2026, the RBI formally proposed linking digital currencies across BRICS nations for trade and tourism payments, an agenda item for the 2026 BRICS Summit that India is scheduled to host. While Japan is not a BRICS member, its Project Agorá participation offers a technical bridge model for cross-network interoperability. Markets such as Bangladesh and Sri Lanka, which maintain correspondent banking relationships through Japanese institutions, may also find the BOJ's DLT experiment directly relevant to their own infrastructure planning.
In Africa, central banks in Nigeria and South Africa are considering their own CBDC and DLT-based settlement pilots. Regulators on the continent face the challenge of justifying blockchain infrastructure investment to domestic stakeholders and international lenders. A successful BOJ experiment would provide a G7 precedent that African policymakers can reference. The African Continental Free Trade Agreement (AfCFTA) is developing a digital payment stack for intra-continental trade, a market that currently accounts for less than 25% of Africa's total trade volume and represents an estimated potential of $3.4 trillion in economic activity, according to industry projections (Disruption Banking).
What Comes Next
The BOJ has not disclosed a timeline for when sandbox experiments will begin, how long they will run, or what criteria would mark success. The sandbox framing signals extended research rather than near-term deployment. Ueda described the bank's forward agenda as exploring "methods of connection with existing systems as well as examining use cases such as domestic interbank settlement and securities settlement."
No external statements from independent commentators were publicly available at the time of publication. Organizations such as the Japan Fintech Association and the BIS Innovation Hub are expected to offer analysis as the experiment progresses and findings become available; their perspectives will be important for assessing the program's broader policy implications.
The Project Agorá Phase 1 report, expected before mid-2026, will likely shape how the BOJ and its partner central banks frame the next stage of this work. Its findings will carry implications across multiple audiences. For developers building on tokenized real-world assets or cross-chain interoperability layers, the report will set technical benchmarks for how wholesale central bank money moves across networks. For policymakers and regulators in South Asia, Africa, and other markets tracking wholesale CBDC development, it will offer a closely watched G7 data point against which to calibrate their own programs.