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List of Operators (Validators)

Validators are those who operate node servers that sign on the blockchain, also referred to as Signers. This blockchain ensures the reliability of its data through mutual verification by these Validators. Validation of a blockchain approved by a Validator can be conducted by anyone connecting a node to the Japan Open Chain.

In Phase 3, the number of Validators is expected to expand to a maximum of 21 companies.

Consortium Administrator​

List of Validators​

CAC Corporation​

  • CAC envisions becoming a group of companies that continues to make a positive impact on society through technology and ideas by leveraging the latest technologies such as blockchain and AI to develop products and services that positively influence clients and society's future.

Corgear Co., Ltd.​

  • Corgear Co., Ltd., a startup within the Sony group, is a creator-technologist collective aiming to realize social innovation by addressing community challenges.
  • Cyberlinks is committed to contributing to the promotion of DX for the entire industry by proposing safe, secure, low-cost, high-quality, and high-function cloud services through a shared cloud under the brand concept "LINK Smart—an era of connecting without owning."

Dentsu Inc.​

  • Dentsu Inc. offers services in advertising and marketing, utilizing diverse media, technology, and design to contribute to the success of clients' brands and businesses.

G.U. Technologies, Inc.​

  • G.U. Technologies, Inc. aims to create a free and happy society through innovative ideas and solid technology, gearing up for a new digital revolution era where finance and information merge via blockchain.

Hatena Co., Ltd.​

  • Hatena Co., Ltd. develops content platform services like "Hatena Blog" and "Hatena Bookmark" for individual users and leverages its technology and user power to offer various corporate services and solutions.

insprout Co., Ltd.​

  • insprout Co., Ltd. is involved in future-making ventures centered on IT, including startup investment, internet services, and system development.

Kudasai Co., Ltd.​

  • Established as KudasaiJP in 2020, Kudasai Co., Ltd. is one of Japan's largest cryptocurrency communities. The company supports the growth of Web3 companies with multi-faceted and comprehensive growth support solutions, from blockchain startup planning and development to advisory and community expansion.

Minna Bank, Ltd.​

  • Minna Bank is a digital bank and smartphone bank that aims to create new financial functions by being a connecting entity for people, things, money, and information.

Nethermind​

  • Nethermind focuses on assisting businesses and developers in constructing decentralized systems. They are heavily invested in areas such as cryptographic research, security, DeFi, protocol development, and have recently ventured into hardware, zero-knowledge proofs, AI, promoting innovation at the intersection of blockchain and robotics. Their team comprises over 300 members, including more than 250 engineers crucial to the development of Ethereum and the growth of the Starknet ecosystem. Nethermind offers comprehensive services, supporting clients from ideation to execution.

pixiv Inc.​

  • pixiv provides platform content services to make creative activities enjoyable for creators worldwide.

SBINFT Co., Ltd.​

  • SBINFT, a subsidiary of SBI Holdings, focuses on Web3 businesses centered around NFTs. With the corporate mission "Be the FIRST. Be the STANDARD. Spread NFTs to society, at the center of it," SBINFT seeks to lead innovation in providing NFT-related services that become societal norms on a reliable platform. Since April 2021, they have operated the approval-based NFT marketplace "SBINFT Market," and from April 2024, they will offer "SBINFT Mits," a marketing platform that visualizes, nurtures, and acquires fans.

TIS Inc.​

  • TIS offers a broad range of services from core systems supporting businesses to high-competitiveness applications and platforms, providing IT services that preemptively address latent needs and management challenges of clients.

extra mile Co., Ltd.​

  • A member of the TV Asahi group, extra mile Co., Ltd. aims to contribute to society through entertainment that brings smiles to everyone by pursuing innovations and creating new ideas and services that make life convenient and enjoyable.

Uryuyama Gakuen Kyoto University of the Arts​

  • Embracing a straightforward love for nature and humanity, Kyoto University of the Arts is where ambitious students gather from Japan and worldwide, ranging from 18 to 92 years old, making it the largest art university in Japan with over 8,500 students.

Others​

Japan Open Chain cooperates with the Ethereum Community, advancing the research of Enterprise Ethereum, while enabling practical members involved in development to receive technical advice.

How to Participate as a Validator​

To become a Validator, approval from a majority of existing Validators is necessary after an evaluation. Currently, participation is envisaged only for corporations within Japan due to compliance with Japanese law. However, Japanese subsidiaries of foreign companies can participate. While direct participation from overseas corporations beyond a majority is being considered for the future, it is not currently allowed.