Sulzer IHI(DU), Mitsubishi, Sumitomo, Hitachi
B&W Mitsui, Hitachi, Makita
M.A.N. Mitsubishi, Kawasaki
Pielstick IHI(DU), NKK(JFE), Niigata
UE Mitsubishi, Akasaka, Kobe Diesel, UBE
Others Hanshin, Niigata, ITO, Makita, Fuji Nippatsu,
Daihatsu, Yanmar, Kubota
Tanabe, Yanmar, Matsubara, Suction Gas Engine, Sanwa,
Teikoku-Hamworthy
Mitsubishi, Alpha Laval, Tomoe
Teikoku, Heishin, Shinkokinzoku, Naniwa, Taiko, Kosaka,
Ishii, Fujita, Ebara, Daito
Osaka Boiler, Nishida, Miura, Takuma, IHI, Gadelius,
Kawasaki, Hada, Volcano, Sunflame, Sasakura
Daikin, Nissin, Namirei, Sabroe, Mitsubishi, Maekawa,
Carrier, Rotasco
IHI(Turbo Systems United), Mitsubishi(MET), Niigata-Napier
IHI, Fukushima, Mitsubishi, Tsuji, Kubota, Kayaba,
Tokyo Kikai, Kawasaki, Shinko, Yutani, Uchida, Ebara,
Macgregor
IYamatake-Honeywell, Yokogawa-Hokushin, Nakakita, Tokyo Keiki,
Terasaki, Tokyo Keiso, Nabco,
Misuzu, Fuji, Omron, Saginomiya, Danfoss, Shinko, Taiyo, Meiyo,
Ridadenki, Maroll, Nagano,
Oki, Nishishiba, Musashino, Mitsubishi, Kokosha, Sumitomo Precision
JRC, Anritsu, Kyoritsu, Tokyo Keiki, Furuno, Nunotani,