| IWAS INTERNATIONAL GROUP LIMITED | Private company limited by shares | Dissolved |
| IWASA HONG KONG COMPANY LIMITED | Private company limited by shares | Dissolved |
| Iwasa Technology Limited | | Live |
| IWASA WINDSOR COMPANY LIMITED | Private company limited by shares | Live |
| IWASAKI ELECTROPLATING COMPANY LIMITED | Private company limited by shares | Dissolved |
| IWASH LIMITED | Private company limited by shares | Live |
| iWash Limited | Private company limited by shares | Live |
| IWASHI TECHNOLOGY LIMITED | Private company limited by shares | Live |
| IWASHITA INSTRUMENTS (H.K.) LIMITED | Private company limited by shares | Live |
| iWasThere Limited | Private company limited by shares | Live |