Sumitomo Metal Mining Co Ltd (SMM) is a Japanese company engaged in mineral-resource development, non-ferrous-metal mining, electronic materials, catalysts, and related research and development. It carries out the smelting and refining of metals such as copper, nickel, and gold. The company also manufactures and sells battery materials, powder materials, and advanced materials. SMM serves industries including automobiles, energy, environment, communications, and home appliances. The company operates eight smelting and refining plants and nine operational mines. It produces main products such as electrolytic copper, gold, electrolytic nickel, and electrolytic cobalt. It holds interests in overseas mines, including the Cote Gold Mine in Canada and the Quebrada Blanca Copper Mine in Chile. The company has a production capacity of 450kt/year for its copper smelting operations. The Hishikari Mine, produced a cumulative amount of 272.6 tons of gold as of March 31, 2026. The company has a presence in 13 countries and regions including the US, China, and Taiwan.

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SMM conducts R&D in mineral resources, smelting and refining, advanced materials, environmental and energy applications, and information and communications technologies. Key initiatives include AI and IoT adoption in manufacturing, equipment, information, and development; development of smelting, refining, exploration, mining, and mineral-processing technologies; powder synthesis and surface treatment; crystal growth and processing; and basic research on powder materials. The company also focuses on new product development through market and technology trend analysis, long-term R&D planning, and prioritization of research themes. The Technology Division manages the company’s R&D organization. It comprises four departments, three laboratories, and one research center. The departments support the research center and laboratories and help improve the efficiency of R&D activities for new products and technologies. The named R&D facilities are Niihama Research Laboratories, Battery Research Laboratories, Materials Laboratories and Ichikawa Research Center. In FY2026, the company spent JPY9.0 billion on R&D activities.