| Regular Members |
| Aisawa Construction Co.,Ltd. |
| ASANUMA CORPORATION |
| Asunaro Aoki Construction Co.,Ltd. |
| DAI NIPPON CONSTRUCTION |
| Daiho Corporation |
| Fudotetra |
| Fujita Corporation |
| FUKUDA CORPORATION |
| 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 CORPORATION |
| Nishimatsu Construction Co.,Ltd. |
| OBAYASHI CORPORATION |
| OHMOTO GUMI CO.,LTD. |
| OKUMURA CORPORATION |
| Okumura Engineering Corporation |
| Oriental Shiraishi Corporation |
| P.S.Mitsubishi Construction Co.,Ltd. |
| PENTA-OCEAN CONSTRUCTION CO.,LTD. |
| RINKAI NISSAN 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 |
| The Zenitaka Corporation |
| TOA CORPORATION |
| TOBISHIMA CORPORATION |
| Toda Corporation |
| TOKYU CONSTRUCTION CO.,LTD. |
| TOYO CONSTRUCTION CO.,LTD. |
| WAKACHIKU CONSTRUCTION CO.,LTD. |
