• Aikoku Alpha Engineering Corporation
  
• Astro Research Corporation
  
• CRC Research Institute,Inc.
  
• High-Reliability Components Corporation
  
• Hitachi, Ltd.
  
• Imai Aero Equipment Mfg Co.,Ltd.
  
• Ishikawajima-Harima Heavy Industries Co.,Ltd. (IHI)
  
• JAMCO Corporation
  
• Japan Aviation Electronics Industry,Limited
  
• Japan Manned Space Systems Corporation (JAMSS)
  
• Japan Satellite Systems Inc. (J-SAT)
  
• Japan Science and Technology Corporation
  
• JGC Corporation
  
• Kanematsu Aerospace Corporation
  
• Kawasaki Heavy Industries, Ltd. (KHI)
  
• Mitsubishi Corporation
  
• Mitsubishi Electric Corporation
  
• Mitsubishi Heavy Industries
  
• Mitsubishi Research Institute,Inc.
  
• Mitsubishi Space Software
  
• NEC Aerospace Systems,LTD.
  
• Nippon Avionics Co.,Ltd.
  
• Nippon Electric Co.,Ltd. (NEC)
  
• Nippon Steel
  
• Nippon Telegraph and Telephone Corporation (NTT)
  
• Nissan Motor Co.,Ltd.
  
• Nissho Iwai Corporation
  
• NTT Data
  
• Rocket System Corporation
  
• Shinko Electric Co.Ltd.
  
• Space Communications Corporation (SCC)
  
• Tokyu Agency
  
• TOMEN Corporation
  
• TOSHIBA Corporation
  
• Total Media Development Institute Co.