| HISA LIMITED | | Live |
| HISADA HONG KONG CO., LIMITED | Private company limited by shares | Live |
| HISADA ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| HK HISAHARU CO., LIMITED | Private company limited by shares | Live |
| HK HISAIL HOLDING LIMITED | Private company limited by shares | Live |
| JOE HISAISHI PUBLISHING LIMITED | | Live |
| HISAKO INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| HISAMICHI INFRASTRUCTURE CAPITAL INVESTMENT (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| HISAMITSU SEIYAKU (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| Hisamitsu Pharmaceutical (Hong Kong) Co., Limited | Private company limited by shares | Live |
| HI-SAN RESOURCES (OVERSEAS) LIMITED | Private company limited by shares | Live |
| HISATAKE GROUP CO., LIMITED | Private company limited by shares | Live |
| Hisatir Office Furniture Co., Limited | | Live |
| Hisatomi Electronics (HK) Co., Limited | Private company limited by shares | Live |
| HISAYA DAIKOKUDO (H.K.) LIMITED | Private company limited by shares | Dissolved |