HashKey Cloud Partners with Quantum Solutions on Japan’s First DAT Staking Initiative, Powered by the HashKey CaaS Platform to Support Listed Firms’ Digital Asset Expansion

Hong Kong, Nov. 25, 2025 – HashKey Cloud, a global Web3 infrastructure service provider under HashKey Group, today announced a partnership with Quantum Solutions Co., Ltd. (TSE: 2338) to jointly launch Japan’s first DAT Staking collaboration.

The collaboration, led by HashKey Cloud, and delivered through HashKey Group’s newly launched one-stop service platform, HashKey CaaS. It will provide Quantum Solutions with professional, secure Ethereum (ETH) staking and restaking services, marking the first time a publicly listed Japanese company participated in Ethereum staking and achieved digital asset value appreciation through the DAT via a professional institution.

The partnership will leverage HashKey Cloud’s strengths in institutional-grade staking infrastructure, risk management to help Quantum Solutions enhance asset efficiency while exploring innovative scenarios such as restaking and DeFi yield aggregation. As a pioneer in institutional staking and crypto asset management, HashKey Cloud is driving Web3 financial innovation in the Japanese market through its strong compliance and technological expertise.

Leo Li, CEO of HashKey On-Chain Business Unit, said:“We are honored to partner with Quantum Solutions to promote the digital transformation of asset allocation among listed companies. Japan’s acceptance of blockchain technology and its regulatory maturity are truly encouraging. HashKey Cloud will continue to provide secure, professional, and scalable institutional-grade products and services to help enterprises integrate steadily into the Web3 ecosystem.”

Francis B. Zhou, CEO from Quantum Solutions said:"Quantum is proud to be one of the first listed companies in the world to engage in institutional-grade ETH staking, in partnership with the HashKey Group. This is the beginning of our active strategy to generate returns on our ETH reserves."

As one of the most mature and high-potential crypto markets in Asia, Japan’s on-chain value has grown significantly over the past year, alongside continuous regulatory improvements. The collaboration between HashKey Cloud and Quantum Solutions marks a key step forward in the Japanese market and provides a replicable model for listed companies to participate in compliant crypto asset management, paving the way for broader blockchain adoption in capital markets.

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About HashKey Cloud

HashKey Cloud, as a leading provider of global Web3 infrastructure and a core member of the HashKey Group, focuses on delivering professional, stable, and secure blockchain services to clients worldwide. Since 2018, we have been deeply committed to blockchain infrastructure technologies, with our staking services covering over 80 mainstream public chains and continuous exploration into Ethereum Layer2 and BTC Staking.

We have upgraded our product line as Web3 transitions from foundational technology to application development. Our new product line includes Professional Staking Service Designed Specifically for ETH ETF Issuers (ETF Staking Pro). We aim to meet the diverse needs of our clients and provide top-notch services to the global market.

About Quantum Solutions

Quantum Solutions (TSE: 2338) is a Japan-based technology company focusing on AI infrastructure (AIDC), Web3 integration, and digital-asset treasury management (ETH strategy). The company is dedicated to creating an “Asset-Backed Technology” ecosystem that bridges traditional capital markets and the decentralized digital economy.