| YAMAGA LIMITED | Private company limited by shares | Live |
| YAMAGATA LIMITED | Private company limited by shares | Dissolved |
| YAMAGATA INTERNATIONAL CO., LIMITED | Private company limited by shares | Dissolved |
| YAMAGATA (Hong Kong) Co., Limited | Private company limited by shares | Live |
| HONGKONG YAMAGAWA CO., LIMITED | Private company limited by shares | Dissolved |
| YAMAGAWA PROMOTION LIMITED | Private company limited by shares | Dissolved |
| YAMAGAWA SPORTS LIMITED | Private company limited by shares | Live |
| YAMAGEN ELECTRONICS HONG KONG CO., LIMITED | Private company limited by shares | Live |
| YAMA-GEN ENTERPRISES LIMITED | Private company limited by shares | Live |
| YAMAGEN HONG KONG CO., LIMITED | Private company limited by shares | Live |
| NOMIS AND YAMAGEN LIMITED | Private company limited by shares | Dissolved |
| SENWEN YAMAGEN INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| YAMAGIWA TRADING (HONG KONG) CO., LIMITED | Private company limited by shares | Dissolved |
| YAMAGIWA DEVELOPMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| Yamaguchi Limited | | Live |
| YAMAGUCHI INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| YAMAGUCHI TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |