Toho Zinc Co., Ltd. engages in the manufacture and sale of non-ferrous metals, electronic components and building materials. It operates through the following segments: Smelting and Refining, Mineral Resources Business, Electronic Components and Materials, Environment and Recycling Business, and Others. The Smelting and Refining segment produces and sells non-ferrous metals such as zinc, lead, silver, and sulfur. The Mineral Resources Business segment deals with the exploration and development of non-ferrous metal resources. The Electronic Components and Materials segment manufactures and sells electronic components, electrolytic iron, plating, and machine parts. The Environment and Recycling Business segment engages in the production of zinc oxide and recycling of waste materials. The Others segment includes sound proof construction materials, civil engineering, construction, plant engineering, transportation, and environmental analysis businesses. The company was founded on February 27, 1937 and is headquartered in Tokyo, Japan.