ITOKI Corporation
Sanyu Civil Engineering
Sanyutechnos Plant Engineers Corporation
Tsumura Kogei Co., Ltd.
Yamashita Seisakusho Co., Ltd.
Odakyu Engineering
MHS Planners, Architects & Engineers, Ltd.
Kobe Steel, Ltd.
Taikisha Ltd.
Daiken Sekkei Inc.
Tokai Sanyu Technos Co., Ltd.
Motys Co., Ltd.
IHI Corporation
IHI Transport Machinery Co., Ltd.
RAIZNEXT Corporation
Toshiba Energy Systems & Solutions Corporation
Asahi Kasei Engineering Corporation
Ebara Jitsugyo Co., Ltd.
Kakoki Plant & Environment Engineering Co., Ltd.
Takasago Thermal Engineering Co., Ltd.
Mitsui E&S Holdings Co., Ltd.
Mitsubishi Chemical Engineering Corporation
Mitsubishi Heavy Industries, Ltd.
Mitsubishi Hitachi Power Systems, Ltd.
Chiyoda Corporation
Chiyoda Kosho Corporation, Co. Ltd.
Kawasaki Heavy Industries, Ltd.
Tanabe Engineering Corporation
Tokyo Gas Engineering Solutions Corporation
Tokyo Electric Power Services Co., Ltd.
JGC Corporation
JGC JAPAN Corporation
Nippon COMSYS Corporation
Yahagi Construction Co., Ltd.

Total of 117 Companies
※From ~ 2019 Performance