NTT West Introduces Off-site PPA for Headquarters Building

NTT West Corporation (Headquarters: Osaka City, Osaka Prefecture; President: Ryota Kitamura; hereinafter "NTT West"), as a symbolic initiative of its sustainability management, will begin implementing an off-site corporate PPA*1 (hereinafter "off-site PPA") on April 1, 2026 (Wednesday). This initiative, conducted in collaboration with NTT Anode Energy Corporation (Headquarters: Minato-ku, Tokyo; President: Teruyuki Kishimoto; hereinafter "NTT Anode Energy"), involves the long-term procurement of renewable energy for its headquarters building.

Through this initiative, the headquarters building will achieve effectively 100% renewable energy usage by utilizing renewable energy-derived electricity*2 via the off-site PPA and leveraging renewable energy-designated non-fossil fuel certificates*3. By reducing greenhouse gas emissions, the company aims to achieve both the realization of a decarbonized society and sustainable business growth.

1. Background and Purpose In line with the NTT Group's new environmental energy vision, "NTT Green Innovation toward 2040," which targets carbon neutrality by fiscal year 2040, NTT West has been considering ways to reduce greenhouse gas emissions in its business activities, including the introduction of renewable energy.

NTT West will now begin the implementation of an off-site PPA to procure renewable energy on a long-term basis for its four headquarters buildings (located in Miyakojima-ku, Osaka City, Osaka Prefecture) in collaboration with NTT Anode Energy, with the use of renewable energy-derived electricity at the headquarters starting April 1, 2026 (Wednesday).

This is expected to result in approximately 7 million kWh*4 of electricity being derived from renewable sources annually, with an anticipated reduction of approximately 3,000 tons*5 of greenhouse gas emissions per year.

2. Overview of the Initiative A corporate PPA (Power Purchase Agreement) is a contract in which a consumer purchases renewable energy-derived electricity from a power producer over the long term through a retail electricity provider. An off-site PPA is a model where electricity is transmitted from a remote power generation facility to the consumer (in this case, the headquarters building) via the power transmission and distribution network. In this off-site PPA, NTT Anode Energy reduces risks, such as those during disasters, by dispersing the developed solar power plants across multiple locations.

(1) Start Date: April 1, 2026 (Wednesday) (2) Location: Miyakojima-ku, Osaka City, Osaka Prefecture NTT West Headquarters Buildings (4 buildings: NTTWEST i-CAMPUS Building A, Building B, QUINTBRIDGE, and PRISM)

3. Future Outlook The NTT West Group positions the realization of carbon neutrality by fiscal year 2040 as a key management issue. Starting with this off-site PPA implementation at the headquarters, the company will proceed with expanding renewable energy adoption to other locations and creating decarbonization solutions in collaboration with local communities and customers.

Furthermore, NTT Anode Energy will strive to meet the needs of society and consumers while engaging in the advanced adoption and utilization of renewable energy, thereby contributing to the realization of carbon neutrality for society as a whole.

*1: A corporate PPA (Power Purchase Agreement) is a contract in which a consumer purchases renewable energy from a power producer over the medium to long term. An off-site PPA is a model where electricity is transmitted from a remote power generation facility to the consumer (in this case, the four NTT West headquarters buildings) via the transmission and distribution network of a general power transmission and distribution utility. Electricity from the solar power plants is supplied to the target facilities using the off-site PPA scheme, and any shortfall in power from the solar plants is supplied via electricity from sources such as the wholesale electricity market as supplementary power. *2: This electricity supply is provided by ENNET Corporation (Retail Electricity Provider Registration Number: A0009), a member of the NTT Anode Energy Group, with NTT Anode Energy acting as an agent. By procuring a combination of renewable energy and renewable energy-designated non-fossil fuel certificates, the company achieves effectively 100% renewable energy. Specifically, electricity from the solar power plants is supplied to the target buildings using the off-site PPA, and any shortfall is supplied via electricity from sources such as the wholesale electricity market as supplementary power. Both the solar power and the electricity from the wholesale market are assigned renewable energy-designated non-fossil fuel certificates. *3: A non-fossil fuel certificate certifies the environmental value (non-fossil value) of electricity generated from "non-fossil power sources" that do not use fossil fuels such as oil or coal. By providing electricity in combination with renewable energy-designated non-fossil fuel certificates, it becomes possible to utilize electricity that is effectively 100% renewable. *4: This is an estimated value based on the actual electricity consumption of the four NTT West headquarters buildings in fiscal year 2024. *5: This calculation is a reference value based on Scope 2 calculations, applying the Kansai Electric Power emission factor for the 2026 reporting year (0.000415 t-CO2/kWh).

*The information contained in this news release is current as of the date of the announcement. Please be aware that it is subject to change.