| Company Name | Type | Status |
|---|---|---|
| SEIWA COMPANY LIMITED | Private company limited by shares | Dissolved |
| SEIWA COMPANY LIMITED | Private company limited by shares | Live |
| SEIWA MACHINERY LIMITED | Private company limited by shares | Live |
| SEIWAJYUKU FEDERATION COMPANY LIMITED | Private company limited by shares | Live |
| SEIWAJYUKU HONG KONG LIMITED | Company limited by guarantee | Live |