Toagosei Co., Ltd., together with its subsidiaries, manufactures, distributes, and sells chemical products in Japan and internationally. The company operates through Commodity Chemicals, Polymer & Oligomer, Adhesive Material, Performance Chemicals, and Plastics segment. It offers inorganic products, including liquid caustic soda, liquid chlorine, synthetic hydrochloric acid, sodium hypochlorite, caustic and super potash, sulfuric acid, sodium sulfite, potassium pyrophosphate, and copper oxide, as well as iron perchloride, hypochiorous acid, copper pyrophosphate, and copper potassium pyrophosphate solutions; chlorinated solvents, such as trichlorethylene and tetrachlorethylene; and ammonium sulfate and potassium bicarbonate fertilizers.