What is the significance of Tokyo Ohka Kogyo’s new geothermal power deal with Kyushu Electric?

This is the first off-site corporate power purchase agreement (PPA) using geothermal power adopted by a semiconductor materials manufacturer in Japan, as of July 2026; it will supply approximately 50% of the annual electricity consumption at two Tokyo Ohka Kogyo sites in Kumamoto, reducing CO₂ emissions by an estimated 1,730 metric tons per year.

Why did Tokyo Ohka Kogyo choose geothermal energy over other renewables for its factory operations?

Tokyo Ohka Kogyo selected geothermal power because it offers stable, 24/7 electricity generation unaffected by weather or time of day, and has a capacity utilization rate of 82% — the highest among renewable energy sources including hydropower, wind power, and biomass — making it uniquely suited to support industrial operations.

Tokyo Ohka Kogyo, Kyushu Electric Sign Geothermal Power Deal

Jul 22, 2026

Semiconductor materials producer Tokyo Ohka Kogyo signed a geothermal power deal with Kyushu Electric Power. By July 2026, 50% of its Kumamoto factory's electricity will come from geothermal sources, reducing annual CO2 emissions by 1,730 metric tons.

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