| VOKO (MITSUI) HOLDING COMPANY LIMITED | Private company limited by shares | Dissolved |
| MITSUI POWER COMPANY LIMITED | Private company limited by shares | Live |
| RICH MITSUI LIMITED | Private company limited by shares | Dissolved |
| MITSUI ROBATAYAKI LIMITED | Private company limited by shares | Live |
| MITSUIANA COMPANY LIMITED | Private company limited by shares | Dissolved |
| Mitsui&Co Limited | | Live |
| MITSUISHI CO., LIMITED | Private company limited by shares | Live |
| MITSUIWA ASIA CO., LIMITED | Private company limited by shares | Live |
| MITSUIWARUDO LIMITED | Private company limited by shares | Dissolved |