Shikoku Electric Power Co., Inc. (Yonden) is a Japanese electric utility serving the four prefectures of Shikoku—Kagawa, Tokushima, Ehime, and Kochi. Headquartered in Takamatsu, it operates across the electricity value chain, including power generation, transmission and distribution, and retail supply to residential, commercial, and industrial customers.
Yonden’s generation portfolio includes thermal power (notably LNG and coal), hydroelectric resources, nuclear power centered on the Ikata Nuclear Power Station, and an expanding base of renewable energy. The company manages regional grid operations and supports reliable power supply for key manufacturing and process industries in Shikoku. Through the Yonden Group, it also undertakes related engineering, maintenance, and information and communications services that underpin energy infrastructure.
In addition to domestic operations, Yonden participates selectively in energy projects and partnerships, reflecting broader sector trends in efficiency, grid modernization, and low‑carbon power.