- Sapporo Office
- Morioka Office
- Sendai Branch
- Fukushima Office
- Utsunomiya Office
- Saitama Branch
- Tokyo Btranch
- Niigata Office
- Yokohama Branch
- Matsumoto Office
- Nagoya Branch
- Kanazawa Branch
- Kyoto Branch
- Osaka Branch
- Kobe Branch
- Okayama Office
- Hiroshima Branch
- Takamatsu Office
- Fukuoka Branch
- Minami Kyushuu Office
Maintenance service center in Japan
- Chiba
- Setagaya
- Shizuoka
- Minami Osaka
- Hanna
Reserch & Institute of Functional Water
- The University of Tokyo