Geothermal power generation
Idemitsu Kosan began its geothermal business in 1996 by conducting geothermal Resources surveys and supplying steam to Kyushu Electric Power Co.'s Takigami Power Plant in Kokonoe, Oita Prefecture. In 2017, the company began independent operation of the Takigami Binary Power Plant. It is currently building a new geothermal power plant in the Oyasu region of Akita Prefecture.
We will continue to work on geothermal Resources exploration and development, as well as the stable operation of geothermal power plants, with the aim of domestic geothermal development that is rooted in the local community.
Basic information
What is geothermal power generation?
Geothermal power generation uses the power of high-temperature water and steam heated by underground magma. Our company has been working on this since the 1970s as a purely domestically produced energy that can generate electricity stably.
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Our strengths
In Oita Prefecture, we supply steam for power generation to the Takigami Power Station of Kyushu Electric Power Co., Inc. We also utilize unused hot water Resources to operate the Takigami Binary Power Station commercially.
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Initiatives for new development
We are currently constructing a new geothermal power plant (named the Katatsumuriyama Power Plant) in the Oyasu region of Akita Prefecture. We aim to start operations in 2027 through Oyasu Geothermal Co., Ltd., a joint venture with INPEX CORPORATION and TEPCO Renewable Power Inc.
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