- KOBE STEEL, LTD. TAKASAGO WORKS
- KOBE STEEL, LTD. KOBE Corporate Research Laboratories
- KOBE STEEL, LTD. KAKOGAWA WORKS
- KOBE STEEL, LTD. HARIMA PLANT
- KOBELCO Compressors Corporation
- Shinko Techno Engineering Co.,Ltd
- EBARA CORPORATION
- Kawasaki Heavy Industries ,Ltd.
- NIKKISO CO.,Ltd.
- Torishima Pump Mfg. Co.,Ltd.
- GE Energy Japan
- MITSUBISHI HEAVY INDUSTRIES,LTD TAKASAGO WORKS
- MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
- FUJITEC ENGINEERING CORPORATION
- Japan John Crane, Inc.
- FUJI ELECTRIC CO., LTD.
- TonenGeneral Sekiyu K.K.,
- Hokkaido Electric Power Co., Inc.
- TOSHIBA CORPORATION
- Tokyo Electric Power Company Holdings, Inc.
- Hitachi, Ltd.
- SHOWA YOKKAICHI SEKIYU CO.,LTD.
- Formosa Petrochemical Corporation (TAIWAN)
- IFFCO (INDIA)
- Other
