• Chiyoda Corporation 
  
• Hitachi, Ltd. 
  
• IHI Corporation
  
• JFE Engineering Corporation
• JGC Corporation  
  
• JGC Japan Corporation 
• JGC Holdings Corporation
  
• Kawasaki Heavy Industries, Ltd. 
  
• Kobe Steel, Ltd. 
  
• Mitsubishi Heavy Industries Asia Pacific Pte. Ltd.(Singapore)
  
• Mitsubishi Heavy Industries Engineering, Ltd. 
• Mitsubishi Heavy Industries Transportation and Construction Engineering, Ltd.
  
• Mitsubishi Heavy Industries, Ltd. 
• Mitsubishi Hitachi Power Systems, Ltd. 
  
• Mitsui Engineering & Shipbuilding Co.,Ltd. 
  
• MHPS Engineering Co.,Ltd.
• Nippon Steel & Sumikin Engineering Co.,Ltd
• Toshiba Energy Systems & Solutions Corporation
• Toyo Engineering Corporation  
  
• etc.
  

(In alphabetical order)