| Company Name | Type | Status |
|---|---|---|
| KEIO ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| KEIO INVESTMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| UPDATE KEIO LIMITED | Private company limited by shares | Live |
| KEION SYSTEM LIMITED | Private company limited by shares | Live |
| KEIOU COMPANY LIMITED | Private company limited by shares | Live |
| ITALY KEIOY FINERY LIMITED | Private company limited by shares | Dissolved |