As of June 2, 2025, Proteus Marine Renewables’ AR1100 tidal turbine, which has a capacity of 1.1MW, has officially received certification from Japan’s Ministry of Economy, Trade, and Industry (METI), the national authority that regulates energy infrastructure and technology. [1] The certification confirms the system meets Japan’s regulatory standards for power generation, which marks a new chapter for tidal energy in the country. The turbine is currently exporting power to the national grid. METI conducted a thorough review and testing process to verify the turbine’s operational safety and reliability, and the certification was granted after successful performance under various tidal conditions. The turbine represents the next stage in Proteus’ roadmap for scaling tidal power, serving as the forerunner to the company’s most powerful turbine, the ARI3000. The deployment forms part of a long-standing collaboration between Proteus and Kyuden Mirai Energy Co., Inc. (KME) that is the representative company for the project. The collaboration aims to support Japan’s renewable energy transition, demonstrating that tidal energy has the potential to join Japan’s future energy mix. Proteus and KME are now continuing to explore additional opportunities for tidal generation capacity in Japan.
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