- CEO
- Mamoru Kuwada
- Full Time Employees
- 14,850
- Sector
- Process industries
- Industry
- Chemicals: specialty
- Address
- Yaesu Central Tower Shunan YG Japan 104-8467
- IPO Date
- May 16, 1949
- Business
- Tosoh Corporation (4042.T) manufactures and sells basic chemicals, petrochemicals, specialty products, and fine chemicals through five primary business groups including Petrochemical, Chlor-Alkali, Specialty, Engineering, and Others; the company offers olefins such as ethylene, propylene, and polypropylene; polymers including low-density polyethylene, linear low-density polyethylene, high-density polyethylene, synthetic rubber, and polychloroprene rubber; chlor-alkali products comprising caustic soda, vinyl chloride monomer, polyvinyl chloride, methylene diphenyl diisocyanate, calcium hypochlorite, chlorinated paraffins, and cement varieties like Portland, blast-furnace slag, and fly ash; specialty items encompassing organic chemicals such as ethyleneamines, flame retardants, polyurethane catalysts, benzyl alcohol, hydrocarbon solvents, piperazine, sodium styrene sulfonate, and bromochloropropane, advanced materials including silica glass, sputtering targets, zeolites, zirconia, battery materials, electrolytic manganese dioxide, thin-film materials, and bioscience products like automated immunoassay analyzers, glycohemoglobin analyzers, high-performance liquid chromatography systems, chromatographic resins, and laboratory automation solutions; engineering services focused on water treatment equipment; and other support services in logistics, analytical services, information technology, and personnel management. Founded in 1935 as Toyo Soda Manufacturing Co., Ltd. in Yamaguchi Prefecture and renamed Tosoh Corporation in 1987, the company maintains corporate headquarters in Tokyo, Japan, with global manufacturing and marketing operations spanning East Asia, Europe, North America, and other regions through more than 130 group companies including subsidiaries like Tosoh Quartz Corporation and Tosoh America, Inc. Recent developments include the October 2024 grand opening of an expanded European headquarters for Tosoh Bioscience–Separation and Purification in Griesheim, Germany, featuring advanced labs for chromatography applications, biopharma, and polymer analysis to support customer training and innovation; the November 2024 startup of a CO2 capture facility at the Nanyo plant producing carbon-derived isocyanates and capturing 40,000 tonnes per year of CO2 to advance decarbonization goals; and an ongoing share repurchase program announced in 2025 pursuant to Tokyo Stock Exchange regulations.