Our association’s regular members (As of 01 Jan 2025: 23 companies)
| AQUAINTEC CORP. |
| ISHIGAKI COMPANY, LTD. |
| IWAO JIKI KOGYO CO.,LTD. |
| EBARA CORPORATION |
| Kanadevia Corporation |
| Kubota Corporation |
| SANKI ENGINEERING CO., LTD. |
| Sumitomo Heavy Industries Environment Co., Ltd. |
| TAKUMA CO., LTD. |
| TSUKISHIMA JFE AQUA SOLUTION CO., LTD. |
| DMW CORPORATION |
| Toshiba Infrastructure Systems & Solutions Corporation |
| Tomoe Engineering Co., Ltd. |
| Torishima Pump Mfg. Co., Ltd. |
| Hitachi Industrial Products, Ltd. |
| Hitachi, Ltd. |
| Hitachi Plant Services Co.,Ltd. |
| Maezawa Industries, Inc. |
| Mitsubishi Kakoki Kaisha, Ltd. |
| Mitsubishi Heavy Industries Environmental & Chemical Engineering Co.,Ltd. |
| Mitsubishi Electric Corporation |
| MEIDENSHA CORPORATION |
| METAWATER Co., Ltd. |
