| OiKa Network HK Limited | Private company limited by shares | Live |
| OIKA.HK LIMITED | Private company limited by shares | Live |
| OIKA.HK COMPLEX LIMITED | Private company limited by shares | Live |
| OIKAI INDUSTRIAL SHARE CO., LIMITED | Private company limited by shares | Live |
| OIKAI HARDWARE PRODUCTS (HK) CO., LIMITED | Private company limited by shares | Live |
| OIKANOR COMPANY LIMITED | Private company limited by shares | Live |
| Oikaris Limited -The- | Private company limited by shares | Dissolved |
| HONGKONG OIKAY INNOVATION TECH CO., LIMITED | Private company limited by shares | Live |
| OIKAZE LIMITED | Private company limited by shares | Dissolved |