| SPEEDMAX LIMITED | Private company limited by shares | Dissolved |
| SPEEDMAX SHIPPING CO., LIMITED | Private company limited by shares | Live |
| SPEEDMAX CORPORATION LIMITED | Private company limited by shares | Dissolved |
| SPEEDMAX ENTERPRISES LIMITED | Private company limited by shares | Live |
| SPEED-MAX INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| SPEEDMAX INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SPEEDMAX INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SPEEDMAX R/C-TECH LIMITED | Private company limited by shares | Live |
| TAMIYA SPEEDMAX R/C-TECH LIMITED | Private company limited by shares | Dissolved |