Sumitomo Metal Mining Co., Ltd., together with its subsidiaries, engages in the resource development, manufacture, and sale of non-ferrous metal products in Japan and internationally. It operates through Mineral Resources, Smelting and Refining, and Material segments. The company is involved in the development and operation of the Hishikari Mine and other mines; smelting and refining business, which provides metal products, such as copper, nickel and cobalt, silver, platinum, rhodium, ruthenium, palladium, slag sand, copper sulfate, selenium, gypsum, sulfuric acid, and green sand, as well as gold and precious metals, rolled copper foil, copper and brass strips, tin plated copper and brass strips, and iron contained pellets; and develops and produces battery materials. It also produces battery cathode material for vehicles; lithium tantalate and lithium niobate for communication devices; cesium tungsten oxide, other near infrared ray absorbing materials, and thick film pastes; copper-clad polyimide films and printed wiring boards; silicon-carbide semiconductor; and automobile exhaust gas purification catalysts, chemical catalysts, and hydrotreating catalysts. In addition, the company engages in the water and precious metals recycling; water treatment and environmental improvement operations; and environmental preservation; sterilization, disinfection, and polymer material modification services for medical devices, non-woven fabrics and hygienic materials, laboratory and clinical testing equipment, containers, food packaging materials, pharmaceutical, cosmetic, and herbal medicine materials. Further, it is involved in the coastal shipping, port transport, in-plant logistics, and land transportation. The company was formerly known as Seika Kogyo (Mining) Co., Ltd. and changed its name to Sumitomo Metal Mining Co., Ltd. in June 1952. Sumitomo Metal Mining Co., Ltd. was incorporated in 1550 and is headquartered in Tokyo, Japan.