| JAPAN CONSTRUCTION SYSTEM (JCS) ENVIRONMENT TECHNOLOGY.HONGTENG INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| J.C.S.A CO., LIMITED | Private company limited by shares | Live |
| JCSC LIMITED | Private company limited by shares | Live |
| JCSJ LIMITED | Private company limited by shares | Live |
| JCSM INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| JCSport Co., LIMITED | | Live |
| JCSS Company Limited | | Live |
| JCST TRADE LIMITED | | Live |
| JCS-Tech Limited | Private company limited by shares | Live |
| JC.STYLE COMPANY LIMITED | Private company limited by shares | Dissolved |
| JCSY COMPANY LIMITED | Private company limited by shares | Live |
| JCSY Biotech Holding Limited | | Live |