About us
Company Overview
Company Name IHI Power Systems Co.,Ltd.
Capital Three Billion Japanese Yen
President Takashi Murasumi
Address of Head Office 14-5,Sotokanda 2-Chome,Chiyoda-ku,Tokyo 101-0021 Japan
TEL:  +81-3-4366-1200
FAX:  +81-3-4366-1300
URL:  https://www.ihi.co.jp/ips/
Date Founded 3rd February 2003
Business Lines Diesel Engines
Gas Engines
Dual Fuel Engines
Gas Turbines
Power Generators
Fuel injection equipment
Geislinger Couplings, Dampers
Foundry Parts

1853 Ishikawajima Shipyard is established.
1895 Niigata Engineering is established as engineering plant of Nippon Oil Co,. Ltd.
1910 Niigata Engineering Co., Ltd. is established. (splits off from Nippon Oil)
1919 The Niigata’s first own designed diesel engine is developed as the first industrial diesel engine in Japan.
1960 Ishikawajima Heavy Industries Co., Ltd. and Harima Shipbuilding & Engineering Co., Ltd. merge to establish Ishikawajima-Harima Heavy Industries Co., Ltd. (IHI).
1966 Niigata engine plant and Niigata foundry plant are established.
1976 Ohta plant is established.
1988 Diesel United, Ltd. (DU) was established by merger of Diesel Engines Divisions of IHI and SHI.
1994 Niigata gas turbine plant is established.
2003 NIIGATA Power Systems Co., Ltd. is established, taking over the "engines and turbines" business from Niigata Engineering to IHI.
2005 5,800kW class Gas engine tops World Record with an electric generation efficiency of 47.6%
2007 The company name is changed from "Ishikawajima-Harima Heavy Industries Co., Ltd" to "IHI Corporation".
2007 The production total attains 35 million PS.
2007 The number of reciprocating engine production attained 40,000 sets.
2008 28AHX is developed as an environmentally friendly medium-speed marine engine compliant with IMO NOx TierⅡ.
2010 The capital investment for the production capacity reinforcement of Z-Peller and diesel engines was completed.
2011 The first hybrid propulsion system for tugboat in Japan is developed.
2011 Small size medium-speed marine engine 17AHX is developed.
2012 Spark ignition Gas engine 28AGS is developed as top level of electric generation efficiency of 2,000 kW.
2013 Z-Peller® achieved the nation’s largest number of 4,000 units.
2014 Development and sales launch of medium-speed dual fuel marine engine AHX-DF that meets IMO Tier III NOx Regulations.
2014 The reciprocating engine production total attains 40 million PS.
2014 High power diesel engine V28AHX is developed that achieved the world’s best fuel economy in the class.
2015 The first LNG tugboat in Japan has entered service, equipped with new dual fuel marine engine 6L28AHX-DF.
2017 Training Center opened at Ohta Plant.
2019 IHI Group's Power Systems Business was integrated to form IHI Power Systems Co., Ltd.
2023 Transferred large marine engine business to MITSUI E&S.