Eku Energy Japan Co., Ltd., the Japanese subsidiary of Eku Energy, a global developer, investor, and operator of battery storage projects, today announced that it has signed a land purchase agreement with the Gunma Prefectural Enterprise Bureau (Director: Masashi Narita) for the development of the Naganohara BESS.

The signing of this agreement marks a significant milestone in this project, which has been advanced over approximately three years through collaboration between the Company and Gunma Prefecture, and moves the development into the concrete implementation phase toward the start of operations in 2029.

The Naganohara BESS, to be constructed near Naganohara Town in Agatsuma District, Gunma Prefecture, is currently planned to have a rated output of 30 MWand a battery storage capacity of 120 MWh, with operations scheduled to begin in 2029. This project is a large-scale initiative, following the "Hirohara BESS" in Miyazaki Prefecture, the "Eshi BESS" in Okayama Prefecture, and the "Kamitonno BESS" in Fukuoka Prefecture which are among the domestic BESS projects announced by our company. Since our establishment in 2022, we have significantly expanded our specialized team and are building a business foundation deeply rooted in the Japanese market.

In the Tokyo Electric Power Company service area, the first output control of renewable energy in the region began in March 2026^*,highlighting the growing importance of flexible electricity supply-demand balancing and stable grid operations as renewable energy deployment continues to expand. Battery energy storage systems play a critical role in enabling greater integration of clean energy into the grid by absorbing and storing surplus renewable electricity, such as solar and wind energy, and supplying it when needed. This project will contribute to supply-demand balancing and grid stability in the Tokyo Electric Power Company service area, while supporting the more effective use of renewable energy and Japan’s transition toward its2050 carbon neutrality goals.

Eku Energy is committed torealizing cost-effective clean energy and accelerating the global energy transition by providing safe and reliable energy storage solutions. Leveraging the extensive experience and expertise of our global organization, we are expanding our business with a deep commitment to the Japanese market. Moving forward, we will continue to work on building next-generation energy infrastructure that supports power grid stabilization and the effective utilization of renewable energy, with the aim of achieving Japan’s 2050 carbon neutrality goal.

Comment from the Representative

Masashi Narita, Director of the Gunma Prefectural Enterprise Bureau

“I would like to express my heartfelt welcome and deep gratitude that another important step has been taken toward locating the ‘Naganohara BESS,’ operatedby Eku Energy Japan Co., Ltd., within the Naganohara-Mukaihara Industrial Park, which is being developed by the Gunma Prefectural Enterprise Bureau. We believe that grid-connected energy storage systems will play an indispensable role in the future, from the perspectives of maximizing the utilization of renewable energy and ensuring a stable supply of electricity. We have high expectations that, through the expertise of Eku Energy—a company with a global track record in the development, construction, and operation of battery energy storage systems—they will build a relationship of trust with the local community and provide safe, highly reliable energy storage solutions.”

Kentaro Ono, President and CEO, Eku Energy Japan

“We are very pleased to have acquired land within the Naganohara-Mukaihara Industrial Park from the Gunma Prefectural Enterprise Bureau, marking an important step toward realizing the Naganohara BESS project. Grid-scale battery energy storage facilities must operate safely over the long term and earn trust as part of critical power infrastructure. We recognize the significant responsibility that comes with advancing this project on industrial land prepared by Gunma Prefecture.

Eku Energy has built expertise globally across the development, construction, and operation ofbattery energy storage projects, while tailoring our approach to local market conditions and regional characteristics in Japan.

Through the Naganohara BESS project, we will continue prioritizing safety and reliability while building trusted relationships with local communities. This project represents our long-term commitment to Japan and our ambition to help shape next-generation energy infrastructure together with local communities.