Mitsui Mining & Smelting

Mitsui Kinzoku Company, Limited, together with its subsidiaries, manufactures and sells functional engineered and electronic materials in Japan, China, India, Asia, North America, and internationally. It operates through four segments: Functional Materials Business, Metals Business, Automotive Parts Business, and Other Businesses. The company offers copper foil with carrier film, resin-coated copper foil, electro-deposited copper foil, and material of capacitors; catalysts; tin and zinc oxide, copper, silver, and solder powders, as well as power metallurgy; hydrogen storage alloy and lithium manganese oxide; tantalumu, niobium oxides, and carbides, as well as cerium oxide abrasives; oxides/rare earth compounds, metal products, and rare earth salts/ceramics; alumina and silicon carbide refractories, fine ceramics, and metalofilter; sputtering targets; engineered liquids; debondable glass carrier materials; and negative thermal expansion materials and LNMO cathodes. It also provides zinc and zinc base alloys; chemical products; lead, tin, bismuth, and antimony trioxide; gold and silver ingots and powders, concentrated and fuming sulfuric acid, and electric copper, copper ingots, and wire rods; and mineral and geothermal resources, as well as mineral resources development and environmental protection engineering services. In addition, the company engages in corrosion prevention; engineering; mechatronics; perlite; information technology systems; and rolled copper businesses. Further, it is involved in nonferrous metal smelting; precious metal recycling; raw material related businesses; and manufacturing and sale of automotive parts/components. The company was formerly known as Mitsui Mining & Smelting Co., Ltd. and changed its name to Mitsui Kinzoku Company, Limited in October 2025. Mitsui Kinzoku Company, Limited was incorporated in 1950 and is headquartered in Shinagawa, Japan.