Investor Presentaiton

Power/Renewable Energy Segment Power Solar Category Biomass Power Plant 34 domestic locations Keihin Biomass Power Plant (Kanagawa) Tosa Power Plant (Kochi) Operating Company Idemitsu, other Keihin Biomass Power Tosa Green Power Fukui Green Power (Fukui) Fukui Green Power Tokuyama Biomass Power Plant (Yamaguchi) Idemitsu Solar Wind Rokkasho Village Village Wind Farm (Aomori) Futamata Wind Development Geothermal Takigami Binary Power Plant (Oita)* Idemitsu Oita Geothermal Renewable (Japan) Fire Ohgishima Power Station (Kanagawa) Mizue Thermal Power Plant (Kanagawa) Aichi Refinery Power Plant (Aichi) Ohgishima Power Toa Oil Idemitsu Domestic Solar Fire Overseas (North America, Vietnam, etc.) Overseas Overseas Total Business Overview Stake Owned Power generation capacity* (%) (10,000 KW) 18.7 100 4.9 550 0.3 10 0.1 5.0 40 40 2.0 100 0.5 31.5 285 25 30.5 100 27.6 25.0 114.9 52.1 27.1 79.2 194.1 *Reflects Idemitsu's stake Owning 836 thousand KW(Japan:315, Overseas:521) of renewable energy generation capacity Operating businesses such as wholesale and retail sales for high and low pressure, based on the company's own generation Terminated production in June 2022 Shifting to a system integrator which engages in solar power generator design, construction, maintenance and recycling idemitsu Idemitsu has been supplying the steam for power generation to the Takigami Power Station of Kyushu Electric Power Co., Inc. since start of operation Copyright Idemitsu Kosan Co., Ltd. All Rights Reserved. 62 62

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