| OMRON COMPANY LIMITED | Private company limited by shares | Dissolved |
| Omron Co., Limited | | Live |
| OMRON ELECTRONICS ASIA LIMITED | Private company limited by shares | Live |
| OMRON ELECTRONICS (HONG KONG) LIMITED | Private company limited by shares | Live |
| OMRON (CHINA) GROUP CO., LIMITED | Private company limited by shares | Dissolved |
| OMRON ELECTRICAL GROUP (CHINA) CO., LIMITED | Private company limited by shares | Dissolved |
| OMRON HEALTHCARE LIMITED | Private company limited by shares | Dissolved |
| OMRON GROUP (HK) HOLDINGS CO., LIMITED | Private company limited by shares | Dissolved |
| OMRON (HK) MEDICAL EQUIPMENT LIMITED | Private company limited by shares | Live |
| OMRON PRECISION TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| OMRON AMUSEMENT HONG KONG CO., LIMITED | Private company limited by shares | Live |
| OMRON ELECTRONIC COMPONENTS (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONGKONG OMRON ELECTRIC COMPANY CO., LIMITED | Private company limited by shares | Live |
| USA OMRON MEDICINE GROUP (HK) LIMITED | Private company limited by shares | Dissolved |