BlackRock, SBI Holdings, and Startale Sign MOU to Connect Tokenized Money Market Funds With Japan's First Trust Bank-Backed Yen Stablecoin

BlackRock — the world's largest asset manager and operator of BUIDL, the largest tokenized money market fund by assets — has signed a memorandum of understanding with SBI Holdings and Startale Group to explore connecting tokenized money market funds with JPYSC, SBI's Japanese yen-denominated stablecoin launched in June 2026. The partnership spans three dimensions: technical integration of infrastructure, distribution model development, and regulatory framework navigation. If the integration succeeds, it would create one of the most significant bridges yet built between institutional tokenized fund products and a regulated fiat-backed stablecoin in an Asian market — establishing Japan as a potential model for how on-chain finance connects yield-generating assets to stable settlement currency.

Key Takeaways

• BlackRock Financial Management and BlackRock Japan have signed an MOU with SBI Holdings and Startale Group to explore connecting tokenized MMFs with SBI's Japanese yen stablecoin JPYSC

• The exploration covers three workstreams: technology and infrastructure requirements, business models and distribution opportunities, and regulatory and market development considerations

• The collaboration is designed to be open to other financial institutions and businesses in Japan and internationally — making it a potential industry framework rather than an exclusive bilateral project

• JPYSC launched in June 2026 as Japan's first trust bank-backed yen stablecoin; SBI Shinsei Trust Bank manages issuance and SBI VC Trade, a licensed crypto exchange, handles distribution

• Japan established its stablecoin legal framework in 2022 through amendments to the Payment Services Act, defining fiat-backed stablecoins as Electronic Payment Instruments, with issuance restricted to licensed banks, trust companies, and registered money transfer services

• BlackRock's BUIDL fund — launched in 2024 — has grown to approximately $2.17 billion in assets under management across U.S. Treasurys, overnight repos, and cash, making it one of the largest tokenized funds of its kind globally

• SBI Holdings chairman Yoshitaka Kitao framed the initiative in terms of national strategic urgency: "If Japan is to lead this transformation rather than fall behind, we must prepare early"

What the Partnership Is Trying to Build

An MOU between parties of this institutional weight is an expression of intent to explore rather than a commitment to deliver a specific product. But the stated scope of what BlackRock, SBI, and Startale plan to examine is unusually comprehensive — and the language the companies used suggests they have a concrete end-state in mind even if the route to it remains under development.

The partnership identifies three distinct areas of exploration:

Technology and infrastructure: The partners will examine what technical systems, protocols, and connections are needed to allow tokenized money market funds and the JPYSC stablecoin to interact. The core challenge here is interoperability — how does a tokenized fund share, representing ownership of a portfolio of U.S. Treasurys or money market instruments, become functionally connected to a Japanese yen stablecoin in a way that is both technically reliable and commercially usable?

Business and distribution: Beyond the technical plumbing, the partners will explore what business models emerge from connecting these two asset types, and how their respective distribution networks can be leveraged to take the integrated product to market. BlackRock brings global institutional asset management relationships; SBI brings deep penetration into the Japanese financial market, banking relationships, and a securities platform; Startale contributes blockchain and Web3 infrastructure expertise, particularly within the Japanese and Asia-Pacific technology ecosystem.

Regulation and market development: The third workstream acknowledges that the regulatory environment is not static. Both tokenized funds and stablecoins remain areas of active regulatory development globally and specifically in Japan, and the partners will assess how evolving regulatory frameworks affect the commercial and technical viability of the integration.

The openness of the collaboration to additional participants — "financial institutions and businesses in Japan and internationally," per the announcement — suggests the three companies are not seeking to capture this market for themselves exclusively but to establish the infrastructure and precedent that a broader ecosystem can build on. This is a meaningful signal: if the goal were purely competitive, the partners would limit participation; if the goal is to establish Japan's leadership in on-chain finance, broader participation serves that objective better.

The Products Involved: BUIDL and JPYSC

Understanding the significance of this partnership requires understanding what each product brings to the table.

BlackRock BUIDL: The Tokenized Fund Standard-Bearer

BlackRock launched its USD Institutional Digital Liquidity Fund — marketed under the ticker BUIDL — in March 2024 through the Ethereum blockchain, with Securitize acting as the transfer agent and tokenization platform. The fund invests in U.S. Treasury bills, overnight repurchase agreements, and cash, offering the same investment profile as a conventional institutional money market fund — preservation of capital, daily liquidity, yield broadly in line with short-term government rates — in a blockchain-native form.

BUIDL's growth since launch has been remarkable by tokenized fund standards. At approximately $2.17 billion in AUM according to the announcement, it stands as one of the largest tokenized money market funds in the world — evidence that institutional investors are willing to commit meaningful capital to on-chain fund structures when the regulatory framework, custody infrastructure, and operational quality meet institutional requirements.

BUIDL has also served as a template for the broader tokenized money market fund industry. Its structure — where tokens represent shares in an off-chain fund rather than putting the underlying assets directly on-chain — has influenced how subsequent institutional tokenized funds have been designed, including the Aviva Investors' digital twin structure on the XRP Ledger described in other recent industry coverage.

BlackRock's interest in the Japanese market through this MOU extends its tokenized fund ambitions beyond the U.S. dollar ecosystem into yen-denominated territory — a logical expansion given Japan's size as the world's third-largest economy and the depth of institutional capital managed by Japanese financial institutions.

JPYSC: Japan's First Trust Bank-Backed Yen Stablecoin

JPYSC launched in June 2026, making it the most recent significant product development cited in this MOU announcement. The stablecoin carries a specific architectural distinction that differentiates it from many earlier stablecoin projects: it is backed by a licensed trust bank — SBI Shinsei Trust Bank — under Japan's regulatory framework for Electronic Payment Instruments.

This trust bank backing is not merely a marketing claim. Under Japan's Payment Services Act amendments, fiat-backed stablecoins classified as Electronic Payment Instruments can only be issued by licensed banks, trust companies, or registered money transfer services. This issuance restriction ensures that the fiat assets backing the stablecoin are held in a legally segregated, regulated structure — providing asset protection and supervisory oversight that unregulated stablecoin models historically have not offered.

SBI Shinsei Trust Bank manages JPYSC's issuance, while distribution is handled by SBI VC Trade — a licensed virtual asset service provider (the article refers to it as a licensed crypto exchange) operating under Japan's financial regulatory framework. This two-entity structure separates the issuance and custody function from the distribution function, mirroring the standard separation of roles in regulated financial product distribution.

The trust bank-backed model for yen stablecoins is significant in the context of Japan's broader digital asset strategy. Japan has been among the more proactive major economies in establishing legal clarity for digital assets, and the Payment Services Act framework — combined with Financial Services Agency oversight — provides a regulatory foundation that institutional counterparties in Japan and internationally can rely on when evaluating whether to engage with yen-denominated digital assets.

Japan's Stablecoin Regulatory Framework: Why the Legal Foundation Matters

The partnership announcement is only comprehensible in the context of Japan's legal framework for stablecoins, which the article correctly describes but deserves fuller explanation.

In 2022, Japan's parliament enacted amendments to the Payment Services Act that created a dedicated legal category for fiat-backed stablecoins: "Electronic Payment Instruments" (電子決済手段 in Japanese). The amendments came into force in June 2023, giving Japan one of the earliest comprehensive legal frameworks for stablecoins among major economies.

The framework's key provisions establish:

Who can issue: Fiat-backed stablecoins can only be issued by licensed banks (under the Banking Act), trust companies (under the Trust Business Act), or registered money transfer service operators (under the Payment Services Act). This restriction ensures that stablecoin issuance remains within Japan's existing supervised financial institution universe rather than being available to unregulated technology companies.

What the backing must be: Electronic Payment Instruments must be fully backed by fiat currency holdings, with the backing assets held in a legally protected structure that ensures redemption is available to holders.

Who can distribute: Stablecoin distribution and exchange services require registration as a qualified Electronic Payment Instrument Service Provider — a category distinct from both banks and the general crypto exchange registration, ensuring a specific regulated pathway for stablecoin-specific intermediaries.

This framework is what makes JPYSC viable as an institutional-grade product. An asset manager of BlackRock's scale and regulatory sensitivity cannot build commercial relationships around products whose legal status, backing structure, and issuer accountability are uncertain. Japan's Payment Services Act framework provides the institutional clarity that makes the JPYSC engagement possible.

What Connecting Tokenized MMFs and a Yen Stablecoin Could Actually Enable

The commercial value of the integration the three parties are exploring depends on what "connecting" tokenized money market funds and JPYSC actually means in practice. The MOU does not specify the technical architecture, but the concept points toward several potential models.

JPYSC as Settlement Currency for Tokenized Fund Subscriptions and Redemptions

In the simplest integration model, JPYSC would serve as the on-chain settlement asset for investors subscribing to or redeeming from a tokenized yen money market fund. Rather than routing subscriptions through conventional banking rails — with the associated correspondent banking timelines, FX conversion steps, and settlement delays — investors holding JPYSC could potentially move from stablecoin to fund token and back within a single blockchain settlement cycle.

This model mirrors the USDC-denominated settlement model used by Securitize for several USD-denominated tokenized funds, including BlackRock's BUIDL, where investors use the dollar stablecoin for on-chain subscriptions and redemptions rather than conventional wire transfers. Extending this model to the yen market requires a credible regulated yen stablecoin — which JPYSC is positioned to provide.

Tokenized MMF as Yield-Bearing Backing for JPYSC

A more ambitious integration model would use a tokenized money market fund as part of the reserve backing or yield-generation mechanism for JPYSC itself. In this architecture, some or all of JPYSC's backing assets would be held in tokenized form rather than in conventional bank deposits, allowing the stablecoin to generate a return on its reserves rather than holding idle cash.

This concept — a yield-bearing stablecoin backed by tokenized MMF assets — has been discussed extensively in the global stablecoin space as a potential evolution beyond the zero-yield conventional stablecoin model. It creates a more efficient use of the capital tied up in stablecoin reserves while maintaining the full fiat backing and daily liquidity that Electronic Payment Instruments require under Japanese law.

Whether JPYSC's specific legal structure under the Payment Services Act permits reserve assets to be held in tokenized form rather than conventional bank deposits is precisely the kind of regulatory question the MOU's third workstream — regulatory and market development — is designed to address.

Cross-Border Distribution Through Existing Networks

The MOU's specific mention of leveraging "respective networks and market access" hints at a distribution dimension beyond the Japanese domestic market. BlackRock's global institutional distribution network reaches sovereign wealth funds, pension funds, and corporate treasuries in over 100 countries. If a yen-denominated tokenized fund product — accessible through JPYSC — can be distributed through that network, it potentially opens access to international institutional investors who want yen-denominated liquidity exposure without operating a Japanese banking relationship.

Yoshitaka Kitao's Strategic Framing

SBI Holdings chairman Yoshitaka Kitao's statement in the announcement deserves attention as more than routine executive commentary:

"The shift to onchain finance is becoming an unavoidable global trend. If Japan is to lead this transformation rather than fall behind, we must prepare early and build the foundations for the next generation of financial markets."

The phrase "unavoidable global trend" is notable coming from the chairman of one of Japan's largest financial conglomerates. Kitao has been one of Japan's most prominent advocates for digital asset adoption within institutional finance — SBI Holdings was an early investor in Ripple and has been among the most active traditional Japanese financial institutions in the crypto space.

His framing of on-chain finance as something Japan must lead "rather than fall behind" reflects a competitive national positioning argument: the infrastructure, regulatory precedents, and institutional expertise developed now will determine which financial centres capture the on-chain finance business of the next decade. Japan's Payment Services Act framework gives it a potential head start over many peers in regulatory clarity for stablecoins — but regulatory frameworks are necessary but not sufficient. The business infrastructure, distribution networks, and institutional products that leverage that framework must also be built, and that is what this MOU initiates.

The collaborative statement from the three companies goes further: "The next step is to develop the infrastructure, distribution channels, and regulatory frameworks needed to connect tokenized assets with stablecoins and support broader market adoption." This language positions the Blackrock-SBI-Startale initiative as infrastructure-building for an ecosystem rather than product development for a specific market opportunity — which is consistent with the stated openness to additional institutional participants.

Where the Three Partners Bring Complementary Strengths

The structure of this three-way partnership reflects careful consideration of which capabilities each party needs from the others to achieve an outcome that none could reach independently.

BlackRock brings: global brand credibility in institutional asset management; proven tokenized fund product experience through BUIDL; Securitize partnership and tokenization infrastructure; institutional distribution relationships across global markets; and the track record of managing $2.17 billion in tokenized assets that makes its participation in any tokenized fund initiative the most credible signal available in the market.

SBI Holdings brings: deep penetration in Japan's institutional financial market; existing relationships with Japanese banks, securities firms, pension funds, and insurance companies; regulatory relationships with the FSA and other Japanese financial authorities; the JPYSC product itself, backed by its trust bank subsidiary; licensed crypto exchange operations through SBI VC Trade; and a history of blockchain-forward financial innovation in Japan through investments including SBI Ripple Asia and various Web3 initiatives.

Startale Group brings: blockchain and Web3 technical expertise, particularly in the Japanese market; connections to the broader Asian Web3 developer and infrastructure ecosystem; and experience building blockchain infrastructure that bridges conventional and decentralised financial systems.

Together, the three parties combine the institutional credibility and product precedent (BlackRock), the Japanese financial market access and regulatory standing (SBI Holdings), and the technical blockchain infrastructure capability (Startale) needed to build an integrated tokenized MMF and yen stablecoin product that institutional participants in Japan and internationally would actually use.

The Broader RWA and Stablecoin Convergence Context

The Blackrock-SBI-Startale MOU reflects a broader pattern becoming visible across global financial markets: the convergence of tokenized real world assets and stablecoins as complementary components of institutional on-chain finance infrastructure.

In the USD ecosystem, this convergence has already progressed significantly. Several USD stablecoins have explored or announced integrations with tokenized Treasury products. PayPal's PYUSD stablecoin has been deployed in DeFi contexts where it interacts with tokenized yield-bearing instruments. BlackRock's BUIDL itself has been used as collateral and yield-generating backing in various DeFi protocols.

The Japanese yen market has lagged USD equivalents due to slower stablecoin regulatory clarity — but Japan's 2023 Payment Services Act framework has now created the legal foundation that the USD stablecoin market lacked for years. The launch of JPYSC as Japan's first trust bank-backed yen stablecoin in June 2026, followed immediately by this MOU with BlackRock, suggests the Japanese market is prepared to compress the timeline from regulatory framework to institutional product adoption significantly relative to the USD market's historical path.

The significance extends beyond Japan. A successful JPYSC-tokenized MMF integration could serve as a template for similar structures in other major currency markets: sterling, euro, Singapore dollar, Hong Kong dollar — all of which have their own regulatory frameworks for fiat-backed stablecoins in varying states of development. Each such integration adds a building block to the global on-chain finance infrastructure that institutional participants are gradually assembling.

Key Uncertainties and the MOU's Limitations

Several important caveats apply to reading this announcement:

An MOU is not a product launch. A memorandum of understanding is a pre-contractual document expressing intent to explore. It carries no binding commitment to develop, launch, or distribute any specific product, and exploration may conclude that the technical or regulatory requirements are not currently achievable on a commercially viable timeline.

Regulatory approval is implicit, not guaranteed. Using JPYSC as settlement for tokenized fund subscriptions, or using tokenized fund shares as reserve assets for JPYSC, may require explicit regulatory approvals from Japan's FSA beyond those already obtained for JPYSC's issuance under the Payment Services Act. Those approvals have not been confirmed.

Timeline is unspecified. The announcement contains no milestones, no target dates, and no commitments about when any integrated product might be available to investors.

BlackRock's BUIDL is USD-denominated. Extending BUIDL or a similar structure to yen-denominated assets would require a yen MMF product — not simply deploying existing BUIDL infrastructure in a new currency context. Whether BlackRock intends to launch a yen-denominated tokenized MMF product specifically for this integration is not stated.

These uncertainties do not diminish the significance of the MOU as a signal of strategic intent — the quality and scale of the parties involved make even an exploratory commitment meaningful. But they are important context for investors and market observers calibrating how close to commercial reality the integration described actually is.

Summary

The MOU between BlackRock, SBI Holdings, and Startale Group to explore integrating tokenized money market funds with the JPYSC yen stablecoin is the most significant institutional signal yet of Japan's ambition to build competitive on-chain finance infrastructure. The partnership combines the world's largest asset manager and its $2.17 billion BUIDL tokenized fund, one of Japan's largest financial conglomerates and the issuer of the country's first trust bank-backed yen stablecoin, and a Web3 infrastructure specialist — addressing the three workstreams of technology, distribution, and regulation simultaneously rather than sequentially. Japan's Payment Services Act framework for Electronic Payment Instruments provides the regulatory foundation that makes institutional-grade stablecoin engagement possible; JPYSC's trust bank-backed issuance model provides the credibility that BlackRock-calibre institutional partners require; and BUIDL's existing scale and institutional track record provides the tokenized fund template the integration needs. Whether the exploration produces a specific commercial product, on what timeline, and under what regulatory framework remains to be determined — but the intent expressed by three parties of this institutional weight, in a market with this regulatory foundation, represents a materially more credible step toward institutional-grade on-chain finance in the yen market than any prior announcement in this space.