| KOKU RECYCLING LIMITED | Private company limited by shares | Live |
| KOKU TRANSPORT LIMITED | | Live |
| KOKUI LIMITED | Private company limited by shares | Live |
| KOKUKYO LIMITED | Private company limited by shares | Dissolved |
| KOKUMEN AND COMPANY, LIMITED | Private company limited by shares | Dissolved |
| KoKun Investment Limited | Private company limited by shares | Live |
| KOKURA LIMITED | Private company limited by shares | Dissolved |
| Kokuryu HK Limited | Private company limited by shares | Live |
| KOKUSAI IMC LIMITED | Private company limited by shares | Dissolved |
| KOKUSAI AUTO PARTS (H.K.) LIMITED | Private company limited by shares | Dissolved |
| KOKUSAI CHEMICAL COMPANY LIMITED | Private company limited by shares | Live |
| KOKUSAI CHINA LIMITED | Private company limited by shares | Live |
| KOKUSAI CLUB 21 LIMITED | Private company limited by shares | Dissolved |
| KOKUSAI MEDICOM CORPORATION LIMITED | Private company limited by shares | Dissolved |
| TOMIYASU KOKUSAI CORPORATION LIMITED | Private company limited by shares | Live |
| KOKUSAI DENGYO CO., LIMITED | Private company limited by shares | Live |
| KOKUSAI KEISO (H.K.) LIMITED | Private company limited by shares | Dissolved |
| KOKUSAI SHINJU (HK) LIMITED | Private company limited by shares | Live |
| KOKUSAI SHOJI HONG KONG CO., LIMITED | Private company limited by shares | Live |
| KOKUSAI KOEKI (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| KOKUSAI ASSET MANAGEMENT (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| KOKUSAI (INTERNATIONAL) MACHINES CENTRE LIMITED | Private company limited by shares | Dissolved |
| KOKUSAI HATSUMEI KAIHATSU KYOKAI, LIMITED | Private company limited by shares | Dissolved |
| KYOSEI KOKUSAI LIMITED | | Live |
| MORNING SUN KOKUSAI LIMITED | Private company limited by shares | Dissolved |
| KOKUSAI SALES PROJECTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| KOKUSAI SECURITIES (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Associated Kokusai Services Limited | Private company limited by shares | Live |
| NIHON KOKUSAI SHOSEN (HONG KONG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| KOKUSAI TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| KOKUSAN LIMITED | Private company limited by shares | Dissolved |
| KOKUSHO (HONG KONG) TRADING CO., LIMITED | Private company limited by shares | Dissolved |
| KOKUSO LIMITED | Private company limited by shares | Dissolved |
| KOKUYO OVERSEA PROPERTIES AGENCY LIMITED | Private company limited by shares | Dissolved |
| KOKUYO ASIA LIMITED | Private company limited by shares | Dissolved |
| KOKUYO DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| KOKUYO (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| KOKUYO INTERNATIONAL ASIA CO., LIMITED | Private company limited by shares | Live |
| KOKUYO INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| KOKUYO (OVERSEA INVESTMENT) PROMOTION NETWORK LIMITED | Private company limited by shares | Dissolved |
| KOKUYU WATCH LIMITED | Private company limited by shares | Dissolved |