Setagaya Ward and TOKYU Power Supply Sign Collaboration Agreement to Promote Renewable Energy and Enhance Energy Resilience

Setagaya Ward, Tokyo (Mayor: Nobuto Hoshino, hereinafter "Setagaya Ward") and TOKYU Power Supply Co., Ltd. (Headquarters: Setagaya Ward, Tokyo; President and CEO: Kazuhide Mikashi, hereinafter "TOKYU Power Supply") signed a collaboration agreement on Thursday, July 16, 2026, aiming to further promote the effective utilization of renewable energy using home battery systems and enhance regional resilience during disasters.

In recent years, as efforts to achieve a carbon-neutral society intensify, the adoption of renewable energy sources such as solar power has expanded. At the same time, there is an increasing need to establish systems that can respond to fluctuations in renewable power generation caused by weather and time of day, ensuring that generated electricity is used efficiently without waste.

Additionally, amid the increasing frequency and severity of natural disasters such as earthquakes, typhoons, and heavy rainfall, it has become urgent to ensure that households can maintain a certain level of electricity during power outages and to strengthen the disaster resilience of the entire community.

Setagaya Ward supports RE100※1, an international initiative, and is promoting "Setagaya-style RE100"※2, a locally-led model aiming to expand renewable energy use across the ward in collaboration with residents and businesses. Since 51% of CO2 emissions in the ward originate from households, the ward is implementing initiatives through the UCHIKARA Project, which encourages small individual actions starting from "uchi" (home, self, inside), such as adopting renewable energy electricity plans, to promote carbon neutrality and lead cutting-edge urban development.

TOKYU Power Supply's home battery system "Terumaru Denchi," which is being widely promoted, charges with inexpensive electricity during peak renewable power generation hours (e.g., from solar panels) and discharges during high-demand, high-cost periods such as evenings. This reduces electricity bills for households while also promoting the effective use of renewable energy across society by shifting excess renewable power from peak supply to peak demand periods.

As the first initiative under this agreement, both parties will jointly promote information dissemination targeting detached homes within the ward, encouraging the adoption of TOKYU Power Supply's nearly 100% renewable electricity plans and the home battery "Terumaru Denchi" through the UCHIKARA Project. They will also collaborate on outreach and awareness campaigns to inform residents about various UCHIKARA Project initiatives aimed at achieving carbon neutrality.

Furthermore, they will analyze and evaluate data from households participating in the Terumaru Denchi Project, including electricity cost savings, renewable energy utilization achieved through battery charge/discharge control, contributions to electricity supply-demand balance, and residents' disaster preparedness awareness. The effectiveness of these efforts will be periodically communicated and applied to further advance decarbonization and household disaster resilience.

*For details of the collaboration agreement, please refer to the attached sheet.

※1) An international corporate initiative aiming to power business operations entirely with renewable energy

※2) A locally-led model in which Setagaya Ward, Tokyo, aims to expand renewable energy use across the entire community

[Attachment]

Mayor Hoshino's Comment

We believe this agreement is highly significant in advancing toward carbon neutrality by 2050 and building a sustainable, disaster-resilient community.

In Setagaya Ward, we recognize decarbonization in the household sector—responsible for over half of the ward's CO2 emissions—as a critical challenge and are actively promoting energy efficiency and expanded use of renewable energy. We are also addressing the growing threat of severe natural disasters by prioritizing energy security and enhancing regional resilience during emergencies.

Through this agreement, we aim to combine TOKYU Power Supply's expertise and service capabilities in the energy sector with the Tōkyū Group's deep-rooted local network, along with Setagaya Ward's public mission and outreach capacity, to support residents' decarbonization efforts and expand initiatives that people can join with confidence.

In particular, the "Terumaru Denchi Project" is a vital initiative that combines everyday decarbonization with disaster preparedness through the widespread adoption of home battery systems.

Going forward, we will continue collaborating with TOKYU Power Supply to promote renewable energy use and battery adoption, working together with residents and businesses to realize a sustainable, resilient Setagaya that balances decarbonization and disaster preparedness.

President Mikashi's Comment

We are very pleased to have signed this collaboration agreement with Setagaya Ward.

The Tōkyū Group, guided by our environmental vision "Ordinary days move the future," aims to create communities where environmentally positive actions can be chosen effortlessly, enabling everyone to contribute to a sustainable society and the regeneration of local environments. We believe this vision strongly aligns with Setagaya Ward's "UCHIKARA Project," which promotes carbon neutrality from the household level.

To date, TOKYU Power Supply has advanced carbon neutrality initiatives together with Setagaya Ward, including local production and consumption of renewable energy from the Setagaya Miura Solar Power Plant and promotional campaigns encouraging the switch to renewable electricity plans under the UCHIKARA Project.

As a company committed to urban development, the Tōkyū Group operates deeply embedded businesses within local communities. With the signing of this agreement, TOKYU Power Supply will further strengthen its partnership with Setagaya Ward, striving to create new value through energy services such as the provision of "Terumaru Denchi," making residents' lives more convenient and enriched. We will continue advancing sustainable community development together with residents and contribute to realizing a decarbonized society.

Agreement Overview

Purpose:

Setagaya Ward and TOKYU Power Supply will closely collaborate in the fields of environment and energy, leveraging knowledge and resources related to renewable energy adoption and resilience enhancement, to promote initiatives toward achieving carbon neutrality in Setagaya Ward (advancing sustainable urban development and building a sustainable society) and strengthening regional resilience, thereby solving local challenges and enhancing community appeal.

Areas of Collaboration:

(1) Promotion and awareness of renewable energy electricity, home batteries, and related equipment

(2) Utilization of home batteries, efficient electricity use, and enhancement of energy resilience

(3) Further promotion of the use of solar power and battery systems within the ward

(4) Further effective utilization of electricity generated within the ward, including local consumption

(5) Other initiatives contributing to carbon neutrality

Signing Date:

Thursday, July 16, 2026

Overview of the "Terumaru Denchi Project"

The Terumaru Denchi Project is an initiative by TOKYU Power Supply to support the installation of home battery systems. Batteries are installed at zero cost for the unit, installation, annual usage fee, and transfer fee, supporting disaster preparedness and efficient electricity use.

Application Start Date and Time

Thursday, July 16, 2026 [2:00 PM]

Eligible Residences

Detached homes in Tokyo (excluding remote islands) without installed solar power systems

*Buildings must meet installation requirements set by the company, including structural, equipment, and communication conditions.

Application Method

Please apply via the dedicated website for the "Terumaru Denchi Project."

https://w