| The Toho Zinc Group is engaged in the manufacture and sale of non-ferrous metal products; the exploration, development, production and sale of non-ferrous metal resources; the manufacture and sale of electronic components; environmental and recycling businesses; and logistics and other services. The company operates five businesses. The smelting business manufactures and sells products such as zinc, lead, electric silver, and sulfuric acid. The Mineral Resources segment is engaged in the exploration, development, production and sale of non-ferrous metal resources. The electronic components business manufactures and sells electronic components, electrolytic iron, plating, and equipment components. The environment and recycling business is engaged in manufacturing and sales of zinc oxide and waste treatment and recycling. The civil engineering, construction, and plant engineering business is engaged in the design, construction, manufacture, and sale of facilities. The company also manufactures and sells soundproofing materials and provides services such as logistics and environmental analysis.