Toho Zinc Co Ltd is a Japan-based company mainly engaged in the manufacture and sale of non-ferrous metal products, the exploration, development and production of non-ferrous metal resources, the manufacture and sale of electronic parts, environment and recycle business, the logistics and other business. The Company operates in four businesses. The Smelting & Refining segment manufactures and sells zinc and lead products, electrolytic silver, and sulfuric acid. The Environment & Recycling segment manufactures and sells zinc oxide and waste treatment and reclamation. The Mineral Resources segment explores, develops, produces, and sells non-ferrous metal resources. The Electronic Components & Functional Materials segment manufactures and sells electronic components, electrolytic iron, plating, and equipment components. The Company also operates businesses related to soundproofing materials, civil engineering, construction, plant engineering, transportation, and environmental analysis.