Shikoku Electric Power Co Inc (Yonden) is engaged in the electricity business, focusing on power generation, transmission, and distribution. The company also operates in the information and communications, energy, construction, and engineering sectors. It is involved in the procurement of various fuels for thermal and nuclear power production and is active in renewable energy sources such as solar, hydro, and wind power. The company is also involved in the telecommunications business and international business. It procures coal, LNG, oil, and uranium for thermal and nuclear power generation. Additionally, Yonden is engaged in renewable energy projects, including solar, hydro, and wind power.

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Yonden is engaged in research and development activities to enhance its technological capabilities and competitiveness. The company's R&D initiatives focus on reducing electricity supply costs through technologies that extend equipment lifespan, improve operation and maintenance efficiency, and incorporate digital technologies. Additionally, the company is working towards promoting carbon neutrality by expanding renewable energy, utilizing distributed energy resources, and exploring hydrogen and related technologies. The R&D activities are primarily managed by Shikoku Research Institute Co Ltd, which is responsible for conducting research and development in areas such as the supply and use of electricity. In FY2025, the company spent JPY4,242 million on R&D activity, which stood at 0.5% of its revenue and declined 2.8% YoY.