Bank of Japan Tests Blockchain for Central Bank Reserve Settlement

The Bank of Japan has launched a new sandbox project to test whether blockchain technology can be used to settle central bank reserve deposits held by commercial banks.

Key Takeaways

• BOJ is testing blockchain settlement for central bank reserve deposits held in current accounts.
• The project will explore interoperability with BOJ NET and domestic interbank and securities settlement use cases.
• Japan continues its retail CBDC pilot, with a decision on a digital yen expected in 2026.
• Market participants are watching closely as Japan deepens its blockchain and tokenization strategy.

What Happened?

Bank of Japan Governor Kazuo Ueda announced the sandbox initiative during a speech titled “The New Financial Ecosystem and the Role of Central Banks.” The project will conduct technical experiments using central bank money in the form of current account deposits on blockchain based systems.

The central bank clarified that this is a technical study rather than a policy shift, but the results could influence how Japan modernizes its core financial infrastructure.

BOJ Focuses on Blockchain Interoperability

Governor Ueda explained that the experiment will examine how distributed ledger technology can connect with Japan’s existing settlement framework. In particular, the project will test compatibility with BOJ NET, the country’s primary interbank settlement network.

According to Ueda, “The experiments will look at connections between blockchain systems and Japan’s current settlement infrastructure.” He also stated that the Bank will explore “methods of connection with the existing system” and use cases such as “domestic interbank settlement and securities settlement.”

Analysts say blockchain based reserve settlement could enable instant, round the clock transactions, potentially reducing liquidity gridlock during times of financial stress. The sandbox will also reportedly test atomic settlement, smart contract functionality, artificial intelligence integration, and system compatibility.

However, Ueda cautioned about risks. “If the smart contracts aren’t designed well, there is a chance that the stability of payment systems and financial markets will be put at risk.” His comments underline the importance of controlled experimentation before any broader rollout.

Retail CBDC Efforts Continue

The blockchain sandbox is separate from Japan’s retail central bank digital currency project, but both efforts reflect the country’s broader digital finance strategy.

Japan began CBDC experiments in 2021 and launched a pilot program in 2023. The central bank has not committed to issuing a digital yen, but a decision is expected in 2026.

Ueda reaffirmed that work is ongoing:

Unlike a retail CBDC, which would function as digital cash for consumers, tokenized central bank deposits would represent wholesale central bank money used by financial institutions on blockchain infrastructure.

International Collaboration and Tokenized Deposits

Ueda also referenced Project Agora, an international initiative involving multiple central banks and major private financial institutions. Participants are considering “building a mechanism that would enable central banks, including the Bank of Japan, to issue central bank money as tokenized deposits on the blockchain.”

If successful, the project “may bring innovation in terms of streamlining cross border payments,” Ueda said.

Japan’s efforts align with broader global experimentation, as other jurisdictions such as the United Kingdom and Hong Kong have issued sovereign debt on blockchain platforms.

Japan Deepens Its Blockchain Strategy

The sandbox fits into Japan’s wider policy framework. Under the government’s New Capitalism 2025 plan, blockchain and tokenization are viewed as drivers of economic growth.

In 2025, Japan’s Financial Services Agency sought public input on how certain tokens should be classified under the Financial Instruments and Exchange Act, signaling potential expansion of securities regulations to digital assets.

Private sector activity is also accelerating. JPYC launched Japan’s first yen backed stablecoin under the amended Payment Services Act, which recognizes stablecoins as electronic payment methods. A memorandum of understanding between Sony Bank and JPYC aims to enable real time purchases of yen backed stablecoins directly from bank accounts.

At the same time, SBI Holdings maintains long standing ties with Ripple and the XRP Ledger. While the Bank of Japan has not selected any specific blockchain network for its sandbox, some market participants speculate that existing relationships within Japan’s financial ecosystem could influence future decisions. No official confirmation has been made.

CoinLaw’s Takeaway

In my view, this move shows that Japan is taking a measured but serious approach to blockchain integration. Instead of rushing into a retail digital yen, the Bank of Japan is strengthening the plumbing of the financial system first. I found this particularly important because infrastructure upgrades often matter more than headline grabbing launches.

If blockchain can improve reserve settlement without disrupting stability, it could quietly reshape how central bank money operates behind the scenes. That would be a powerful shift, even if most consumers never directly see it.

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