| KOGA TECHNOLOGY COMPANY LIMITED | | Live |
| OTSUKA KOGAKU CO., (H.K.) LIMITED | Private company limited by shares | Live |
| KOGAME LIMITED | Private company limited by shares | Live |
| KOGAN HK LIMITED | Private company limited by shares | Live |
| KOGAN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SILVIA KOGAN LIMITED | Private company limited by shares | Dissolved |
| KOGAN TECHNOLOGIES PTY. LIMITED | Private company limited by shares | Live |
| KOGANA LIMITED | Private company limited by shares | Dissolved |
| KOGAR SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| KOGARAH LIMITED | Private company limited by shares | Dissolved |
| YIU WAH (KOGARAH) COMPANY LIMITED | Private company limited by shares | Live |
| KOGARAH INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| KOGARLEY ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| KOGAWA INTERNATIONAL LIMITED | Private company limited by shares | Live |
| KOGAWA TRADING LIMITED | Private company limited by shares | Live |