Introducing the On-Site PPA Model to Semiconductor Manufacturing Sites in Japan

Japan Semiconductor Corporation Oita Operations/Iwate Operations, Kaga Toshiba Electronics Corporation, Toshiba Electronic Devices & Storage Corporation Himeji Operations-Semiconductor

As part of its efforts to achieve carbon neutrality, Toshiba Electronic Devices & Storage Corporation Group aims to reduce greenhouse gas (GHG) emissions from all its manufacturing sites to zero by FY2030^*1 and is promoting the use of electricity from renewable energy sources. In line with this initiative, the Group has implemented an on-site PPA^*2 model by installing solar power generation units at its semiconductor manufacturing sites in Japan, including Japan Semiconductor Corporation’s Oita and Iwate Operations, Kaga Toshiba Electronics Corporation, and Toshiba Electronic Devices & Storage Corporation’s Himeji Operations-Semiconductor.

• Japan Semiconductor Corporation Oita Operations/Iwate Operations
  Japan Semiconductor Corporation’s Oita and Iwate Operations have introduced an on-site PPA model by installing a solar power generation system. In April 2024, the largest solar power generation system within the Toshiba Devices & Storage Corporation Group’s semiconductor manufacturing sites was installed at Oita Operations. That same fiscal year, the system generated 6.78 million kWh of electricity, all of which was consumed on-site. The corresponding GHG reduction for the year was 2,759 tons.^*3 At Iwate Operations, construction began in February 2025 on the rooftops of selected manufacturing buildings, with installation completed and operations commencing in May of the same year. The expected annual amount of electricity generation is 759,000 kWh, which will be consumed entirely within the same buildings. The anticipated amount of GHG reduction is approximately 303 tons per year.^*3

• Kaga Toshiba Electronics Corporation
  Kaga Toshiba Electronics Corporation has begun production in its new manufacturing building for 300-mm-wafer-compatible power semiconductors. In July 2024, the company implemented an on-site PPA model by installing a solar power generation system on the roof of the new building. That same fiscal year, the system’s annual amount of electricity generation was 680,000 kWh, which was used entirely for lighting and air conditioning within the building. This contributed to a GHG reduction of 327 tons for the year.^*3

• Toshiba Electronic Devices & Storage Corporation Himeji Operations-Semiconductor
  Himeji Operations-Semiconductor has implemented an on-site PPA model by installing a solar power generation system in the new back-end manufacturing building for automotive power semiconductors, which was completed in March 2025. The system is expected to generate 316,000 kWh of electricity annually, all of which will be consumed within the building, thereby contributing to an estimated GHG reduction of approximately 126 tons per year.^*3

• The Group is expected to achieve an effective 100% renewable energy usage rate by utilizing environmental value certificates for electricity from renewable energy sources such as hydropower, geothermal power, solar power, and other sources that have zero CO₂ emissions.
• PPA: Power Purchase Agreement. A type of contract in which electricity consumers purchase 100% renewable energy directly from power providers. The on-site PPA model involves installing power generation units on the premises, roofs, etc. of electricity consumers.
• Calculated using conversion factors based on the Act on Promotion of Global Warming Countermeasures.

• Toshiba Celebrates Completion of New Back-End Production Facility for Power Semiconductors (Toshiba Electronic Devices & Storage Corporation)

Aerial photograph of Japan Semiconductor Corporation’s Oita Operations

Aerial photograph of Japan Semiconductor Corporation’s Iwate Operations

Aerial photograph of Kaga Toshiba Electronics Corporation

Aerial photograph of Toshiba Electronic Devices & Storage Corporation Himeji Operations-Semiconductor