Sumitomo Metal Mining. 

Sumitomo Metal Mining Co., Ltd., a venerable Japanese enterprise, operates globally in the extraction, processing, and refinement of various non-ferrous metals through its diverse subsidiaries. Its operations are strategically divided into three core business units: Mineral Resources, Smelting & Refining, and Materials. The company manufactures a broad spectrum of metal products, ranging from base metals like copper, nickel, and cobalt to precious metals such as gold. Furthermore, it produces crucial battery components, including various nickel hydroxides and advanced lithium-nickel-cobalt oxide compounds. Its specialized offerings extend to crystal materials for optics and electronics, exemplified by lithium tantalates/niobates and optical isolators. Sumitomo Metal Mining also supplies a wide array of powder materials, spanning thick film pastes, fine metal powders (nickel, copper), nickel oxides, absorbing compounds, sputtering targets, AuSn solder, rare earth magnets, and lubricants. Additionally, it provides packaging solutions like copper-clad polyimide films and printed circuit boards, alongside catalytic converters for automotive and petrochemical industries, and hydroprocessing catalysts. The company's portfolio is rounded out with construction materials and a variety of terminals and connectors. Beyond its core manufacturing, Sumitomo Metal Mining extends its expertise to critical services such as water and precious metals recycling, environmental engineering (including water treatment), radiation-based sterilization and material modification, and domestic shipping. Its portfolio also encompasses real estate and specialized technical engineering services. Tracing its origins back to 1590, the company initially operated as Seika Kogyo (Mining) Co., Ltd. before adopting its current name, Sumitomo Metal Mining Co., Ltd., in June 1952. Its main corporate office is located in Tokyo, Japan.