| Regular Members |
| Aisawa Corporation |
| Asanuma Corporation |
| Asunaro Aoki Construction. Co., Ltd. |
| Dai Nippon Construction |
| Daiho Corporation |
| Fudo Tetra Corporation |
| Fujita Corporation |
| Fukuda Corporationn |
| Hazama Ando Corporation |
| Honma Corporation |
| Iwata Chizaki Inc. |
| JDC Corporation |
| Kajima Corporation |
| Konoike Construction Co., Ltd. |
| Kumagai Gumi Co., Ltd. |
| Maeda Corporation |
| Morimoto Corporation |
| Muramoto Construction Co., Ltd. |
| Nishimatsu Construction Co., Ltd. |
| Nissan Rinkai Construction Co., Ltd. |
| Obayashi Corporation |
| Ohmoto Gumi Co., Ltd. |
| Okumura Corporation |
| Okumura Engineering Corporation |
| Orientaru Shiraishi Corporation |
| P.S. Mitsubishi Construction Co., Ltd. |
| Penta-Ocean Construction Co.,Ltd. |
| Sakata-Construction Co., Ltd. |
| Sato Kogyo Co., Ltd. |
| Seibu Construction Co., Ltd. |
| Shimizu Corporation |
| Sumitomo Mitsui Construction Co., Ltd. |
| Taisei Corporation |
| Takenaka Civil Engineering & Construction Co., Ltd. |
| Tekken Corporation |
| Toa Corporation |
| Tobishima Corporation |
| Toda Corporation |
| Tokyu Construction Co., Ltd. |
| Toyo Construction Co., Ltd. |
| Wakachiku Construction Co., Ltd. |
| The Zenitaka Corporation |
