Horiba
Kikan Buhin
Meiyo Electric
Mitsubishi Electric
Musashino Engineering Works
Nakakita Seisakusho
Naniwa Optical Mfg. Co., Ltd.
Nippon Air Brake
Nippon Zosen Kikai
Nishishiba Electric
Nunotani Hakuoy Kelii Kogyo
Osaka Boiler Mfg. Co., Ltd.
Osaka Zoki Valve Ind. Co., Ltd.
Saacke Japan Tratec Ltd.
Saginomiya Seisakusho
Sasebo Heavy Industries Co., Ltd.
Sawada Seisakusho Co., Ltd.
Seo Koatsu Kogyo Co., Ltd.
Shinko Shoji Co., Ltd.
Shonan Kosakusho Co., Ltd.
Sumitomo Metal Industry Ltd.
Sunflame Co., Ltd.
Taiyo Electric
Takuma Boiler Mfg. Co., Ltd.
Tortoise Engineering Co., Ltd.
Tokyo Keiki
Utsuki Keiki
Volcano Co., Ltd.
Yamatake Honeywell
Yokogawa Hokushin Electric