Corporate members
- Shimizu Corporation
- Taisei Corporation
- Obayashi Corporation
- Penta-Ocean Construction Co., Ltd.
- Oyo Corporation
- Asanuma Corporation
- Toa Corporation
- Toyo Corporation
- Kajima Corporation
- Fudo Tetra Corporation
- Wakachiku Co., Ltd.
- Chubu Electric Power Company
- Toho Gas Co., Ltd.
- Central Japan Railway Company
- Okumura Corporation
- GEOST Institute Ltd.,
- C-Tech Corporation
- Yahagi Construction Co., Ltd.
- Takenaka Corporation
- NEWJEC Inc.
- Nakanihon Engineering Consultants Co., Ltd.
- Kiso-jiban Consultants
- Oriental Consultants Co., Ltd.
- Kurahashi Corporation
- Nishiki Consultant Co., Ltd.
- Nippon Koei Co., LTD.
- Chuden CTI Co., Ltd.
- Kawasaki Geological Engineering Co., Ltd.
- ECOH Corporation
- MAEDA Corporation
- Japan Port Consultants, Ltd.
- Chuden Engineering Consultants Co.,Ltd.
- NIPPON STEEL ＆ SUMITOMO METAL CORPORATION
- PACIFIC CONSULTANTS CO.,LTD.
- HAMASHIMA KASEI
- CTI Engineering Co., Ltd.
- Keisoku Giken Co., Ltd.
- TOKEN C.E.E. Consultants Co.,Ltd.
- IRD Ltd.
- GIKEN LTD.
Individual members (affiliations only)
- Independent Administrative Institution Port and Airport Research Institut
- Ministry of Land, Infrastructure, Transport and Tourism
- Central Nippon Expressway Company
- Central Nippon Highway Engineering Nagoya Co., Ltd.
- Nippon Expressway Research Institute Co., Ltd.
- Toho Gas Co.,Ltd.
- Asanuma Corporation
- Fudo Tetra Corporation
- Penta-Ocean Construction Co., Ltd.
- Obayashi Corporation
- Kajima Corporation
- Okumura Corporation
- Takenaka Corporation
- Taisei Corporation
- Shimizu Corporation
- Toyo Corporation
- Mind Inc.
- Geosphere Environmental Technology Corp.
- NEWJEC Inc.
- OK SOIL Co., Ltd.
- Kiso-jiban Consultants
- Nishiki Consultant Co., Ltd.
- Nippon Koei Co., LTD.
- Murao Chiken
- Maeda Kosen Co., Ltd.
- Eight-Japan Engineering Consultants Inc.
- Chuden Engineering Consultants
- Port Consultant Co., Ltd.
- Japan Institute of Country-ology and Engineering
- Geo-Research Institute
- Chuo Kaihatsu Corporation
- Central Japan Railway Company
- CIVIL ENGINEERING AND ECO-TECHNOLOGY CONSULTANTS Co., Ltd.
- NIPPO NIPPO Corporation
- Onoda Chemico co., ltd.
- Association for the Development of Earthquake Prediction
- Tokyo Electric Power Company Holdings, Inc.
- TOKYO GAS Co., Ltd.
- Keisoku Giken Co., Ltd.
- East Japan Railway Company
- TOKEN C.E.E. Consultants Co.,Ltd.
- HAZAMA ANDO CORPORATION
- Tianjin Port Engineering Institute Ltd. of CCCC First Harbor Engineering Company Ltd.
- GIKEN LTD.
- Gifu National Collage of Technology
- Tohoku University
- Meijo University
- Nagoya Institute of Technology
- Kyushu University
- National Defense Academy of Japan
- Toyohashi University of Technology
- Tokyo Institute of Technology
- Tokyo University of Science
- Nagaoka University of Technology
- Gifu University
- Nagoya University
(as of Aug. 26, 2016, in arbitrary order)