Japan Semiconductor Concludes Virtual PPA Derived from Geothermal Power
June 5, 2026
Japan Semiconductor Corporation
Toshiba Electronic Devices & Storage Corporation
Iwate and Kawasaki, Japan－Toshiba Electronic Devices & Storage Corporation today announced that its group company, Japan Semiconductor Corporation, has concluded a virtual power purchase agreement (PPA)[1] for the procurement of the environmental value[2] of renewable energy from a geothermal power source for a period of almost 15 years.
Toshiba Group’s "Environmental Future Vision 2050" positions countering climate change as an important corporate responsibility. Toshiba Electronic Devices & Storage Group is acting on this by promoting carbon neutrality. The Group aims to achieve net-zero greenhouse gas emissions from all its manufacturing sites by fiscal year 2030[3], and towards this it has already introduced the on-site PPA model and is promoting the use of renewables. Today’s announcement introduces the latest initiative in this area.
Japan Semiconductor concluded the virtual PPA with Waita Second Geothermal Power Co., Ltd., and on June 1, 2026 began to procure environmental value derived from geothermal power equivalent to approximately 19.6 GWh a year. Geothermal power maintains stable output 24 hours a day, unaffected by weather or time of day, and this initiative is expected to yield an annual reduction in greenhouse gas emissions estimated at 9,251 tons[4] (equivalent to about 5,012 households[5]).
Toshiba Electronic Devices & Storage Group will continue to strive for an optimized mix of renewable energy sources by using this and other PPAs, solutions such as on-site solar facilities, and other measures. It will continue to work to reduce environmental impacts from its products and its manufacturing processes, and to contribute to the conservation of the global environment, all toward building a sustainable society.
For more information on Toshiba Electronic Devices & Storage's environmental efforts
Environmental Activities
For more information on Japan Semiconductor’s environmental efforts
Environmental Policy | Sustainability | JAPAN SEMICONDUCTOR CORPORATION
Details of the Geothermal Power Plant Covered by this Virtual PPA
Plant Name: Waita Second Geothermal Power Plant
Location: Oguni Town, Aso District, Kumamoto Prefecture, Japan
Installed Capacity: 4,995 kW
Estimated Annual Power Generation: Approximately 35 GWh/year (equivalent to about 8,950 households[5])
Commercial Operation Start Date: March 14, 2026
Business Entity: Waita Second Geothermal Power Co., Ltd.
Investment and Operation: Furusato Netsuden Co., Ltd.
About Japan Semiconductor
Headquarters/Iwate Office: 6-6 Kitakogyo Danchi, Kitakami, Iwate Prefecture, Japan
Oita Operations: 3500 Oaza Matsuoka, Oita, Oita Prefecture, Japan
Established: January 1973 (Integrated in April 2016 from former Iwate Toshiba Electronics Co., Ltd. and former Oita Operations of Toshiba Corporation)
President: Takeshi Sugahara
Employees: Approximately 1,900 (as of March 2026)
Business: Development and manufacturing of MCUs, ASICs, analog ICs, linear image sensors, and discrete semiconductors (power semiconductors)
Website: JAPAN SEMICONDUCTOR CORPORATION
Notes:
[1] Power Purchase Agreement (PPA): A form of contract in which an electricity consumer directly purchases electricity from a power generation business operator. A virtual PPA is a contract in which a company and a power generation business operator do not trade the electricity itself, but trade only the environmental value of renewable energy, such as non-fossil certificates. An on-site PPA model is one in which power generation equipment is installed using space such as the premises or rooftop of an electricity consumer.
[2] Environmental value: The value of being environmentally friendly, such as renewable energy that does not emit CO₂. This value is traded via certificates and used for corporate decarbonization management.
[3] Includes the purchase of carbon credits.
[4] Calculated based on Kyushu Electric Power, Incorporated’s FY2024 emission factor of 0.472 kg-CO₂/kWh.
[5] Calculated based on 3,911 kWh/year per household, from Ministry of the Environment materials.
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* Information in this document, including product prices and specifications, content of services and contact information, is current on the date of the announcement but is subject to change without prior notice.