| BIWA LIMITED | Private company limited by shares | Dissolved |
| BIWA SHOJI COMPANY LIMITED | Private company limited by shares | Live |
| Biwaa Co., Limited | Private company limited by shares | Live |
| BIWACO LIMITED | Private company limited by shares | Dissolved |
| BIWARD COMPANY LIMITED | Private company limited by shares | Dissolved |
| BIWATER MAN LEE LIMITED | Private company limited by shares | Live |
| BIWAY COMPANY LIMITED | Private company limited by shares | Dissolved |
| Biway Limited | Private company limited by shares | Live |
| BIWAY (CHINA) LIMITED | Private company limited by shares | Dissolved |
| BIWAY ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Biway Technology Limited | Private company limited by shares | Live |