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Whitepaper

September 2025 Edition

Overview​

Japan Open Chain is an Ethereum-compatible consortium-type public blockchain designed to provide a secure and stable infrastructure for Web3 business.

Key Features​

  • Ethereum Compatibility: Full compatibility with Ethereum tools and smart contracts
  • Proof of Authority (PoA): High-speed transactions with trusted Japanese corporate validators
  • Legal Stability: Operated in compliance with Japanese law
  • High Performance: 400-2,000 TPS (compared to Ethereum's 15 TPS)
  • Quick Finality: Deterministic finality in 5 seconds

Token Information​

  • Token Name: JOC COIN
  • Ticker: JOC
  • Total Supply: 1,000,000,000 JOC
  • Use Case: Transaction fees (gas) on Japan Open Chain

Roadmap​

  1. Tokyo Hardfork (2025-2026): PoSA (PoA v2) migration, max 5,000 TPS
  2. Osaka Hardfork (2026-2027): Multi-layer validator system with 500 standard validators
  3. Kyoto Hardfork (2027-2028): Quantum resistance and enhanced disaster tolerance
  4. Gifu Hardfork (2028-2029): IOWN integration and permanent storage layer
  5. Beyond Gifu (2029+): zkRollup, dynamic governance, cross-chain bridges

For detailed information, please refer to the full whitepaper PDF.