Tagawa Battery Energy Storage Project Receives “Renewable Energy Deal of the Year – Battery” at The Asset Triple A Sustainable Infrastructure Awards

Hexa Energy Services G.K. (“Hexa” or the “Company”) is pleased to announce that the project financing for the Tagawa Battery Energy Storage Project, developed by the Company, has received the “Renewable Energy Deal of the Year – Battery” award for the North Asia region under The Asset Triple A Sustainable Infrastructure Awards, part of the Triple A Awards 2026 organized by The Asset, one of Asia’s leading financial publications.*1

This award recognizes the Tagawa Battery Energy Storage Project as a pioneering grid-scale battery energy storage project in Japan, as well as its contribution to the development of sustainable energy infrastructure.

Founded in 1999, The Asset is a leading specialist media platform covering financial markets and infrastructure across Asia, providing analysis, research, events, and awards. The Triple A Awards, organized by The Asset, are prestigious awards with a history of more than two decades, recognizing outstanding companies, financial institutions, and transactions across industries. Award winners are selected through a rigorous review process conducted by The Asset’s editorial board, supplemented by industry dialogue and data analysis. The Asset Triple A Sustainable Infrastructure Awards, one of the award categories, recognize outstanding initiatives in sustainable infrastructure, energy transition, renewable energy, battery storage, and other next-generation infrastructure sectors across the Asia-Pacific region.

About the Award-Winning Project

The award-winning Tagawa Battery Energy Storage Project is an approximately 30MW grid-scale battery energy storage system (“BESS”) project located in Tagawa City, Fukuoka Prefecture, Japan, and was awarded under Japan’s Long-Term Decarbonization Power Source Auction (the “LTDA”) framework. Further details on the project and the completion ceremony are available in the Company’s previous release.*2

Key Factors Recognized

The project was recognized primarily for the following features:

• It represents an innovative business model in Japan, having achieved commercial viability as a standalone grid-scale battery energy storage project while utilizing the LTDA framework.

• It contributes to the establishment of a non-recourse financing model focused on cash flows generated by a grid-scale battery energy storage business supported by the LTDA framework.

• It serves as an important precedent for the development of Japan’s battery storage market, contributing to the further expansion of renewable energy and the stabilization of the power system.

Comment from Yoichiro Mizuta, CEO of Hexa Energy Services

“We are deeply honored that the Tagawa Battery Energy Storage Project has received the ‘Renewable Energy Deal of the Year – Battery’ award at The Asset Triple A Sustainable Infrastructure Awards.

We understand that this recognition reflects its social significance in the innovative nature of our grid-scale battery energy storage business, contributing to the expanded deployment of decarbonized power sources and the stabilization of the power system.

We would also like to express our sincere appreciation to MUFG Bank, Ltd. and Société Générale, which supported the project as mandated lead arrangers, as well as to Nishimura & Asahi, which served as the Company’s legal advisor, Mori Hamada & Matsumoto, which served as lenders’ counsel, and all other stakeholders involved in bringing this project to realization.

Hexa will continue to contribute to the development of sustainable energy infrastructure in Japan through the deployment of grid-scale battery energy storage systems.”

Outlook

Following the Tagawa BESS Project, Hexa is steadily advancing the development, construction and operation of grid-scale battery energy storage projects awarded under the LTDA framework across Japan, including in Hokkaido and Mie Prefecture. Through the　realization of these projects, Hexa aims to contribute to Japan’s energy transition and the advancement of its power infrastructure.

*1 Infrastructure Awards 2026 - Best Deals - North Asia

*2 March 24, 2026 Hexa Energy Services G.K. *Completion Ceremony Held for Japan’s First Operational Long-Term Decarbonization Power Auction BESS Project — Tagawa BESS** - ヘキサ・エネルギーサービス合同会社