- ROBERTS SINTO CORPORATION
- Distributor of TOYO SEIKO in USA
- SONATS
- TOYO SEIKO is a distributor of SONATS in Asia
- Electronics Inc.
- TOYO SEIKO is a distributor of EI in Japan
- SHOCK FORM
- TOYO SEIKO is a distributor of SHOCK FORM in Asia
- Shot Peener
- The world's largest network in Shot Peenig
- Peening Accessories GmbH
- Peening network in Europe (sales of peening accessories)
- Miyazaki Seiko Co., Ltd.
- TOYO SEIKO is a group company of Miyazaki Seiko
