Tosoh Corporation Nanyo Complex is an active petrochemical complex located in Yamaguchi Prefecture, Japan. The complex started commercial operations in 1954 and currently has an active annual capacity of 5.13mtpa. Its capacity is expected to decrease to 5.11mtpa in 2030. The plants in this complex are operated by Tosoh.

Key Products Capacity – Tosoh Corporation Nanyo Complex, 2020

Key products produced in this complex include ethylene dichloride (EDC), caustic soda, chlorine, vinyl chloride monomer (VCM), methylene diphenyl diisocyanate (MDI) etc.

Ethylene Dichloride (EDC) accounts for major capacity share i.e., 26.8% of the total annual capacity of the complex with 1.38mtpa, followed by caustic soda and chlorine with 22% (1.13mtpa) and 19.5% (1mtpa) respectively.

About Tosoh

Tosoh Corp (Tosoh) manufactures and sells basic chemicals, specialty products, petrochemicals and fine chemicals for industry, specialty products and materials for high technology and niche markets. The company’s products portfolio includes olefin products, polyethylene, functional polymers, cement, caustic soda, inorganic and organic fine chemicals, measuring and diagnostic products, functional materials and urethane materials. It also offers services such as product delivery and logistics, insurance agency, equipment maintenance and product sale and purchasing. The company serves chemical, petrochemical, construction, automotive, consumer electronics, information technology, bioscience and environmental markets. It has operations in the US, Europe, Asia and China. Tosoh is headquartered in Minato-ku, Tokyo, Japan.


Information on the petrochemical complexes/plants is sourced from GlobalData’s oil & gas petrochemicals plants database that provides detailed information on all active and upcoming, petrochemical plants globally. Not all companies mentioned in the article may be currently existing due to their merger or acquisition or business closure.