Commencement of Renewable Energy Power Supply to Mukogawa Gakuin Educational Corporation

Daigas Energy Co., Ltd. (hereinafter "the Company"), a wholly-owned subsidiary of Osaka Gas Co., Ltd., has concluded an offsite Power Purchase Agreement (PPA) (*) with Mukogawa Gakuin Educational Corporation, which operates Mukogawa Women's University, and commenced the supply of renewable energy (hereinafter "RE") power (*) from May 2026. RE power will be supplied to Mukogawa Women's University's main campus, Central Campus, and other facilities, with approximately 25% of the total electricity supplied by Osaka Gas to these facilities expected to be covered by solar offsite PPA. This initiative is anticipated to reduce approximately 1,100 tons of CO2 annually. An offsite PPA is an arrangement where a power generation company, a retail electricity provider, and a consumer enter into a long-term, fixed-price power purchase agreement, premised on electricity being supplied from a remote power plant to the demand location via the transmission and distribution network. Due to the recent global situation, the wholesale electricity market (JEPX) has seen sharp rises and falls in prices, further increasing electricity bill volatility. Furthermore, various corporations are procuring RE power with an eye towards future carbon neutrality, and the value of RE may increase further in the future. In this context, offsite PPAs can contribute to a long-term, stable supply of RE. Mukogawa Women's University established the Faculty of Environmental Symbiosis in April 2025 and is focusing on education that realizes a sustainable society utilizing life sciences and global environmental resources. Furthermore, it has been decided that the university will become coeducational from the 2027 academic year, with the goal of empowering students to solve social issues themselves in a rapidly changing and diversifying world. This RE power supply will contribute to achieving that goal. Daigas Energy primarily offers low-carbon and decarbonization solutions that leverage the strengths of an energy company, centered on its "D-Lineup" services, which are based on the three Ds: Decarbonization, Decentralization, and Digitalization. We will continue to work with corporate customers committed to promoting decarbonization to solve challenges towards realizing a carbon-neutral society. *Osaka Gas and Mukogawa Gakuin concluded an offsite PPA agreement with Daigas Energy acting as an agent, and Osaka Gas supplying the electricity. 1. RE Power Supply Destination via Offsite PPA 2. Offsite PPA Scheme Image 3. Company Overview Company Name Osaka Gas Co., Ltd. Head Office Location 4-1-2 Hiranomachi, Chuo-ku, Osaka City, Osaka Prefecture Representative Masataka Fujiwara, Representative Director, President, and CEO Establishment Date April 10, 1897 Business Overview Manufacture and sale of gas, generation and sale of electricity, etc. Company Name Daigas Energy Co., Ltd. Head Office Location 4-1-2 Hiranomachi, Chuo-ku, Osaka City, Osaka Prefecture Representative Hiroyoshi Fukutani, Representative Director and President Establishment Date October 1, 2019 Business Overview Sales and maintenance of gas and electricity for corporate customers, etc. Corporate Name Mukogawa Gakuin Educational Corporation Headquarters Location 6-46 Ikedamachi, Nishinomiya City, Hyogo Prefecture Representative Osamu Okawara, Chairman and President Establishment Date February 25, 1939 Business Overview Operation of universities, high schools, junior high schools, kindergartens, and other educational businesses