BlackRock, SBI and Startale Sign MOU to Link Tokenized MMFs with Japan's Yen Stablecoin
Three heavyweight names in global and Japanese finance have formalized their intent to connect tokenized money market funds with a Japanese yen-pegged stablecoin, a pairing that could reshape how short-term liquidity instruments settle on-chain. The memorandum of understanding signed by BlackRock Financial Management, BlackRock Japan, SBI Holdings, and Startale Group signals that on-chain finance in Japan is moving from concept toward structured collaboration, with stablecoin accounting and infrastructure questions becoming immediately practical for any firm watching this space.
What the MOU Actually Covers
The agreement between the four parties is structured around three distinct workstreams. The partners have committed to examining each area concurrently rather than sequentially, which suggests an intent to reach real conclusions faster than typical exploratory agreements.
Technology and Infrastructure
The parties will assess the technical requirements needed to connect tokenized MMF units with JPYSC, SBI's Japanese yen-denominated stablecoin. This includes identifying integration points between the fund's on-chain representation and the stablecoin's issuance and redemption mechanics. The infrastructure layer is non-trivial: tokenized funds and payment stablecoins typically sit on different smart contract architectures, and interoperability requires either a bridge or a shared ledger layer agreed upon in advance.
Business Models and Distribution
The second workstream focuses on identifying viable commercial structures, particularly how each party's existing networks can be leveraged. BlackRock brings its tokenized fund BUIDL, which launched in 2024 and has grown to approximately $2.17 billion in assets consisting of US Treasuries, overnight repos, and cash. SBI VC Trade, a licensed crypto exchange, currently distributes JPYSC, while SBI Shinsei Trust Bank handles issuance. Startale contributes blockchain infrastructure expertise. Together, that covers issuance, custody, exchange access, and fund management, a relatively complete stack for a pilot programme.
Regulation and Market Development
The third workstream is the one that accounting and compliance teams will watch most closely. The group will assess the evolving regulatory environment for tokenized assets and stablecoins in Japan and in relevant international markets. The MOU is explicitly designed to be open to other financial institutions and businesses, both domestic and cross-border, which means the regulatory conclusions the group reaches could become a template others adopt.
Japan's Legal Framework for Stablecoins: The Foundation Underneath
This MOU does not arise in a regulatory vacuum. Japan amended its Payment Services Act in 2022, with those amendments taking effect the following year. The revised Act introduced a specific category for fiat-backed stablecoins, classifying them as Electronic Payment Instruments. Critically, the law restricts issuance to three types of entity: licensed banks, trust companies, and registered money transfer services. This is precisely why SBI Shinsei Trust Bank sits at the issuance layer of JPYSC: the legal architecture requires it.
JPYSC launched in June 2026 as the first trust bank-backed yen stablecoin in Japan, with SBI VC Trade managing distribution through its licensed exchange infrastructure. The MOU between BlackRock, SBI, and Startale is therefore not speculative in the abstract; it is being layered on top of a stablecoin that already exists, is already regulated under a known framework, and is already in distribution. That distinction matters when assessing how quickly this could move from MOU to live product.
Yoshitaka Kitao, representative director, chairman, and president of SBI Holdings, framed the urgency clearly: "The shift to on-chain 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 joint statement from the parties added that the next phase requires developing "the infrastructure, distribution channels, and regulatory frameworks needed to connect tokenized assets with stablecoins and support broader market adoption."
Accounting Implications: What Changes When an MMF Unit Becomes On-Chain
For accounting teams at financial institutions and corporate treasury functions, the intersection of a tokenized MMF and a fiat-pegged stablecoin raises classification questions that existing standards have not fully resolved.
Classifying the Tokenized MMF Unit
A tokenized MMF unit is, in economic substance, a unit in a money market fund represented as a blockchain token. Under IFRS 9, the classification of that instrument depends on the contractual cash flow characteristics test and the business model test. If the token simply represents a pro-rata share in underlying liquid assets and the holder can redeem at net asset value, the classification analysis follows the same path as a conventional MMF holding. The token wrapper does not change the economic substance.
However, if the token includes features such as programmable transfer restrictions, smart contract conditions on redemption, or yield distribution via on-chain mechanics rather than traditional fund administration, those features could affect the SPPI (solely payments of principal and interest) test. Firms holding tokenized MMF units will need documented legal opinions on whether the token's contractual terms replicate those of a conventional unit exactly, or whether deviations exist that change the IFRS 9 analysis.
Classifying JPYSC in the Books of a Counterparty
JPYSC is a fiat-backed stablecoin issued by a trust bank under Japan's Electronic Payment Instrument framework. For a holder outside Japan, the stablecoin accounting treatment will depend on the holder's jurisdiction and applicable standards. Under IFRS, a yen-pegged stablecoin received as settlement or held on the balance sheet would likely be assessed as a financial asset, specifically a receivable or a cash equivalent depending on redemption terms and the credit quality of the issuer. If redemption is at par on demand from a regulated trust bank, a cash equivalent classification is defensible, though auditors will want to see the redemption mechanics documented. Foreign currency denominated holdings will attract IAS 21 treatment, with translation gains and losses on non-monetary versus monetary asset analysis also needing resolution.
The Settlement Layer Question
One of the structural innovations this MOU is exploring is using JPYSC as the settlement currency for tokenized MMF transactions. If that model is realized, treasury and operations teams need a clear data pipeline: every JPYSC inflow or outflow tied to a fund transaction must be captured with a timestamp, quantity, and the prevailing JPY/functional currency rate at the moment of settlement. Crypto bookkeeping software configured for stablecoin flows will need to handle yen-pegged tokens specifically, including recognition of any de-peg events, however brief, that could give rise to a realized foreign exchange difference.
What This Means for Accounting Firms and CFOs Watching Japan
The B2B implications of this development span advisory, audit, and internal controls.
Client Readiness Assessments
Accounting firms with Japanese financial institution clients, or with global asset managers who access Japanese markets, should begin scoping readiness assessments now. The MOU identifies regulation and market development as a parallel workstream, meaning that regulatory guidance could arrive concurrently with product development. Firms that wait for final guidance before assessing client exposure may find themselves reacting rather than advising.
Key questions to raise with clients now include: Does the firm's chart of accounts have a classification for Electronic Payment Instruments under Japanese law? Does the firm's functional currency analysis account for yen-pegged stablecoin inflows? Is the firm's current digital asset accounting software capable of capturing on-chain settlement events with the granularity required for month-end reconciliation?
Audit Considerations
For audit teams, the combination of a tokenized fund and a stablecoin in a single settlement flow introduces two assertion risks simultaneously. Existence and valuation for the fund unit depend on the integrity of the on-chain token and its correspondence to the off-chain NAV. For the stablecoin, the completeness and cut-off assertions depend on capturing blockchain events at the right point in the settlement cycle. Firms without established procedures for on-chain evidence gathering will need to develop them before this product type reaches their client base at scale. The connection to Korean won stablecoin infrastructure developments is instructive here: similar audit challenges are emerging across Asia's yen- and won-denominated stablecoin projects, and a consistent methodology will serve multi-jurisdiction audit teams better than jurisdiction-specific patches.
Internal Controls for Corporate Treasury
CFOs at multinational firms with Japanese subsidiaries or trading relationships should note that JPYSC is already live and in distribution through SBI VC Trade. If a Japanese counterparty begins offering JPYSC as a settlement option, treasury teams need pre-established controls covering acceptance criteria, balance limits, redemption procedures, and FX translation timing. The time to build those controls is before the first inbound stablecoin settlement, not after. For context on how stablecoin settlement is evolving in adjacent markets, the stablecoin accounting implications of tokenized deposit products provide a useful comparative framework.
The Open Architecture Dimension
One detail in the MOU announcement that deserves specific attention is the explicit statement that the collaboration is designed to be open to various financial institutions and businesses in Japan and internationally. This is not a closed bilateral pilot. It is structured from the outset as a potential market standard, which has significant implications for how quickly comparable products from other issuers might emerge.
If the infrastructure and regulatory framework developed under this MOU becomes a template, the result could be a broader Japanese on-chain capital markets ecosystem where multiple tokenized fund products settle in yen-backed stablecoins. That scenario would require accounting and audit standards to address tokenized MMF settlement at scale, not just as a one-off arrangement. Standard-setters including the IASB and ASBJ (Japan's Accounting Standards Board) have not yet issued specific guidance on Electronic Payment Instruments as settlement assets. The pace of this commercial development may begin to outrun the pace of standard-setting, a dynamic that accounting firms and CFOs should flag in their risk registers.
Frequently Asked Questions
What is JPYSC and who issues it?
JPYSC is a Japanese yen-pegged stablecoin that launched in June 2026. SBI Shinsei Trust Bank manages the issuance under Japan's Payment Services Act framework, which classifies fiat-backed stablecoins as Electronic Payment Instruments and restricts issuance to licensed banks, trust companies, and registered money transfer services. SBI VC Trade, a licensed crypto exchange, handles distribution.
What is the BlackRock BUIDL fund and how does it relate to this MOU?
BUIDL is BlackRock's tokenized fund that launched in 2024. It holds US Treasuries, overnight repos, and cash, and had grown to approximately $2.17 billion under management at the time of this announcement. The MOU explores connecting BUIDL or similar tokenized MMF structures with JPYSC so that on-chain fund transactions can settle in a regulated yen-denominated stablecoin rather than requiring conversion through traditional FX channels.
How should a firm classify JPYSC on its balance sheet under IFRS?
The classification depends on the contractual terms of the specific token. If JPYSC is redeemable at par on demand from a regulated trust bank, a financial asset classification, potentially as a cash equivalent under IAS 7, is defensible. The holder would also need to apply IAS 21 for foreign currency translation if JPY is not the functional currency. Any de-peg event, even a brief one, could give rise to a realized exchange difference that must be recognized. Legal documentation of redemption mechanics and trust bank credit standing should support the accounting policy.
Does the MOU create any immediate compliance obligations for firms outside Japan?
Not directly. An MOU is an exploratory agreement, not a live product. However, firms with Japanese counterparties, operations, or market access should treat this as a forward indicator. If the collaboration produces a live product, international firms that receive or hold JPYSC as settlement will need accounting policies, internal controls, and FX procedures in place. Building those frameworks before the product reaches scale is considerably easier than retrofitting them.
Where does Japan's stablecoin regulation stand relative to other major jurisdictions?
Japan's 2022 amendments to the Payment Services Act gave it one of the earliest and most specific legal frameworks for fiat-backed stablecoins among major economies. The classification of stablecoins as Electronic Payment Instruments with restricted issuers provides regulatory certainty that some other jurisdictions are still working toward. This framework is a key reason why JPYSC could be structured through a trust bank from the outset, rather than operating in a grey area pending legislation.
Source: The Block