TOYO Selected for Feasibility Study on Coaxial Closed-Loop Geothermal Technology in Japan Toyo Engineering advances next-generation geothermal power solutions with JOGMEC approval By: Robert Buluma October 27, 2025 Toyo Engineering Corporation (TOYO) has been officially selected by the Japan Organization for Metals and Energy Security (JOGMEC) to conduct a feasibility study under the "Next-Generation Geothermal Power Generation Technology" program. TOYO’s proposal, titled “Feasibility Study on Coaxial Closed-Loop Geothermal Power Generation Technology in Japan” , has been approved for commissioning, marking a major step toward the domestic implementation of next-generation geothermal systems. Unlike conventional geothermal power, which relies on groundwater or natural geothermal reservoirs, the coaxial closed-loop system can generate electricity wherever heat sources exist, across a variety of geological conditions. The system works by circulating a heat transfer fluid,...
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