- Inorganic Materials Division
- Aluminium Dept., Inorganic Materials Division
- Speciality Chemicals Dept.(Resorcinol), Specialty Chemicals Division
- Performance Chemicals Dept.(Polymer additives), Specialty Chemicals Division
- Performance Chemicals Dept.(Polyolefin emulsion), Specialty Chemicals Division
- Speciality Chemicals Dept.(Rubber Chemical), Specialty Chemicals Division
- Functional Polymers Dept. (Functional Polymers), Advanced Polymers Division
- High-Performance Engineering Plastics Dept., Advanced Polymers Division
- Battery Materials Division
- Sumika Chemtex Co., Ltd. Dyestuffs Group, Dyestuffs and Specialty Chemicals Division
- Sumika Chemtex Co., Ltd. VAE Emulsions Group, Functional Polymers Division
- Sumika Alchem Co., Ltd. Tokyo Head Office
- Some of the products from our Specialty Chemicals Division are handled by Sumika Chemtex Co., Ltd.
- Some of the products from our Inorganic Materials Division are handled by Sumika Alchem Co., Ltd.