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Other Disclosures4499Speee,Inc.Information and Communications, Services and Others

Participation in the "Tokenized Government Bonds and On-Chain Repo Working Group"

Datachain will participate in the “Tokenized Japanese Government Bonds and On-Chain Repo Working Group” of the Digital Asset Co-Creation Consortium organized by Progmat, Inc. It will provide technical cooperation toward the realization and commercialization of tokenized Japanese government bonds and on-chain repo transactions using stablecoins.

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Announced details

Tokenized Japanese Government Bonds and On-Chain Repo Working GroupOn-chain repo transactions involving tokenized Japanese government bonds
Applicable field (uses covered by this announcement)

Rights management for Japanese government bonds, on-chain repo transactions using stablecoins, lending secured by tokenized securities, and financial and payments infrastructure

Relationship between the counterparty and the company
Speee,Inc.4499
Relationship with the Company

Datachain will participate in a working group organized by Progmat, Inc. Capital and personnel relationships are Not disclosed.

CounterpartyProgmat, Inc.

Organizer of the Digital Asset Co-Creation Consortium (DCC). Other company information is Not disclosed.

In this announcement the company addresses none of Contract Value / Offering price / Impact on Business Performance.

Source (materials cited by the company)

Progmat, Inc. press release (https://progmat.co.jp/news/2026-5-8-press/)

Announced details
ItemDetails
Names of Products / Services CoveredTokenized Japanese Government Bonds and On-Chain Repo Working Group, On-chain repo transactions involving tokenized Japanese government bonds
CounterpartyProgmat, Inc.
Counterparty overviewOrganizer of the Digital Asset Co-Creation Consortium (DCC). Other company information is Not disclosed.
Relationship with the CompanyDatachain will participate in a working group organized by Progmat, Inc. Capital and personnel relationships are Not disclosed.
Applicable areaRights management for Japanese government bonds, on-chain repo transactions using stablecoins, lending secured by tokenized securities, and financial and payments infrastructure
SourceProgmat, Inc. press release (https://progmat.co.jp/news/2026-5-8-press/)
Items this document does not state (12)
Contract ValueOffering priceContract DateLaunch dateAward/certification nameAwarding / certifying bodyRegistration number and expiry dateLocationLocation scaleQuantitative EffectsUsage historyImpact on Business Performance

These are items the company does not state in this document. We do not leave them blank, nor fill them in from other sources or by inference.

The reasons the company gives

The company's own explanation, not something inferred from the numbers.

Datachain explains that it will contribute to the commercialization of on-chain repo transactions involving tokenized Japanese government bonds by leveraging its expertise in blockchain interoperability and privacy-preserving technologies on blockchains.

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Participation in the "Tokenized Government Bonds and On-Chain Repo Working Group" | Speee,Inc. (4499) timely disclosure | Komori