Our association’s regular members (As of 01 Apr 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 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. |
