Tokyu Construction Co., Ltd.Kanagawa-ken, Japan
Koenig & Bauer AGBayern, Germany
Roctest Ltd.Quebec, Canada
Onomichi Dockyard Co., Ltd.Kyoto-fu, Japan
EMC International, Inc.
Besterra Co., LtdTokyo, Japan
Skanska ABStockholms Lan, Sweden
Dong Yang Steel Pipe Co., Ltd.
Berenguer Ingenieros SLMadrid, Spain
China Haisum Engineering Co., Ltd.Shanghai Shi, China
Itogumi Construction Co., Ltd.Hokkaido, Japan
Chodai Co., Ltd.Tokyo, Japan