The Society of Fiber Science and Technology, Japan (SFSTJ) has 13 research committees and 6 branches. Each group and branch holds seminars that SFSTJ members can participate in. Members are assigned to a branch based on their contact addresses. Members are also welcome to participate in the various research groups. Branches are Hokkaido-Tohoku, Kanto, Hokuriku, Tokai, Kansai, and Seibu. Research committees are
- Kansei Forum Research Committee
- Fiber Science Research Committee
- Dyeing Research Committee
- Pulp & Paper Research Committee
- Fiber Finishing Research Committee
- Research Committee of Clothing Science
- Advanced Fiber Materials Research Committee (AFMc)
- Supercritical Fluids Research Committee
- Research Committee for Organic Optics and Electronics Materials
- Young Scientists Research Committee
- Medical Materials Research Committee
- Earth-Friendly Textile Material Research Committee
- Standardization of Fastness Research Committee