Sumitomo Metal Mining Co., Ltd. is a Japan-based company that operates in five business segments. The Resources Development segment explores, develops, produces and sells non-ferrous metal resources. It is also engaged in the geotechnical survey and civil engineering businesses. The Metal and Metal Processing segment is involved in the smelting and sale of bronze, nickel, ferronickel, zinc, lead, gold, silver, platinum and others, as well as the manufacture and sale of stretched copper products and specialty foundry pieces. The Electronic Component and Functional Material segment offers electronic materials, electronic components and functional materials. The Others segment is involved in the provision of aerated light-weight concrete, the construction and sale of housing, the nuclear power engineering business, the design, manufacture and construction of environmental conservation facilities, as well as the production and sale of precious metals and chemical catalysts.