Execution of Long-Term Offtake Agreement with Tokyo Gas for Grid-Scale Battery Energy Storage Project

 July ,28, 2026 

　　　
HEXA Energy Services G.K. (Head Office: Chiyoda-ku, Tokyo; Executive Officers: Yuko Shah and Yoichiro Mizuta; “Hexa” or the “Company”) is pleased to announce that it has entered into a long-term offtake agreement with Tokyo Gas Co., Ltd. (“Tokyo Gas”) for the grid-scale battery energy storage project outlined below, which is currently under development by the Company. 

Through this agreement, Hexa will be responsible for the development, ownership and maintenance of the battery energy storage facility, while Tokyo Gas will obtain long-term rights to use and operate the facility in response to power market conditions. 

Amid growing uncertainty in the energy landscape and increasing volatility in power markets, grid-scale battery energy storage systems are becoming increasingly important in supporting power system stability and supply–demand balancing, and are also attracting attention as important assets in power markets. 

This agreement is intended to support the stable advancement of the battery storage business and maximize the value of the battery storage asset by combining Hexa’s capabilities built through its experience in grid-scale battery storage project development and business management with Tokyo Gas’s long-term use and operation of the facility under the offtake arrangement. Hexa will continue to steadily advance grid-scale battery energy storage projects through collaboration with partner companies. 

Project Overview 

Comment from Hexa Energy Services 

“We are very pleased to have entered into this long-term offtake agreement with Tokyo Gas, one of Japan’s leading energy companies advancing the use and operation of grid-scale battery storage in power markets. This agreement is highly meaningful for Hexa as we continue to develop our grid-scale battery energy storage business. 

By combining Tokyo Gas’s use and operation of the facility with Hexa’s project development and management capabilities, we aim to achieve the stable realization of the battery storage business and maximize the value of the asset. 

Outlook 

Hexa is working to enhance power system stability and supply–demand balancing capabilities through the development, construction and operation of grid-scale battery energy storage projects. The Company will continue to work closely with partners while placing importance on coexistence with local communities, safety and environmental considerations, and will contribute to Japan’s energy transition and the advancement of its power infrastructure through the steady realization of battery storage projects.