| YAMAKATA KAISHA LIMITED | Private company limited by shares | Dissolved |
| YAMAKEI COMPANY LIMITED | Private company limited by shares | Dissolved |
| YAMAKI LIMITED | Private company limited by shares | Dissolved |
| YAMAKIN (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| YAMAKIN (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| POWER YAMAKKO COMPANY LIMITED | Private company limited by shares | Live |
| YAMAKO LIMITED | Private company limited by shares | Live |
| YAMAKO (CHINA) GROUP CO., LIMITED | Private company limited by shares | Live |
| GARFIELD & YAMAKO INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| Yamako Optical Company Limited | Private company limited by shares | Live |
| Yamako Optical Company Limited | Private company limited by shares | Live |
| YAMAKO TRADING COMPANY LIMITED | Private company limited by shares | Live |