IHI Corporation
Native name
Company typePublic KK
TYO: 7013
IndustryHeavy equipment
Founded5 December 1853; 170 years ago (1853-12-05)
HeadquartersToyosu IHI Building, Tokyo, Japan
Key people
  • Tsugio Mitsuoka [jp] (chairman)
  • Hiroshi Ide [jp]​ (president and CEO)
ProductsSpace development
Jet engines
Diesel engines
Gas engines
Industrial machinery
Bridge & steel structures
Energy systems
RevenueDecrease¥1486.33 billion (2016)[1]
Increase¥47.39 billion (2016)[1]
Increase¥5.25 billion (2016)[1]
Total assetsDecrease¥1692.83 billion (2016)[1]
Total equityIncrease¥309.99 billion (2016)[1]
OwnerDKB Group
Number of employees
26,618 (2013)
ParentDai-ichi Life (3.49%)

IHI Corporation (株式会社IHI, Kabushiki-gaisha IHI), formerly known as Ishikawajima-Harima Heavy Industries Co., Ltd. (石川島播磨重工業株式会社, Ishikawajima Harima Jūkōgyō Kabushiki-gaisha) is a Japanese engineering corporation headquartered in Tokyo, Japan that produces and offers ships, space launch vehicles, aircraft engines, marine diesel engines, gas turbines, gas engines, railway systems, turbochargers for automobiles, plant engineering, industrial machinery, power station boilers and other facilities, suspension bridges and other structures.[2]

IHI is listed on the Tokyo Stock Exchange Section 1. Following the reporting of a company whistleblower in February 2024, on April 24, 2024, the company announced that investigation was underway by the Ministry of Land, Infrastructure, Transport and Tourism of its subsidiary, IHI Power Systems Co., which had falsified its engine data since 2003, affecting over 4,000 engines worldwide.



Energy and resources

Gas turbines

Aircraft engines

IHI develops, manufactures, and maintains aero engines, either by joint projects of which partners include GE Aviation, Pratt & Whitney, and Rolls-Royce Holdings, or the company itself.[12]

In-house development

Joint development

Licensed production

Parts manufacturing

Space products


Shipbuilding was the founding activity of Ishikawajima in 1853. It remains part of IHI's business activities, although it has been diluted through several mergers with other Japanese shipbuilding companies.[14]

In 1960, Ishikawajima Heavy Industries merged with Harima Shipbuilding & Engineering Company to establish the Ishikawajima-Harima Heavy Industries (IHI). In 1995, Marine United was established jointly with Sumitomo Heavy Industries. In 2013, IHI Marine United was merged with Universal Shipbuilding Corporation owned by the steel company JFE Holdings in order to newly establish a larger firm, Japan Marine United Corporation (JMU), of which IHI remained a shareholder.

In March 2020, Japan Marine United (with 49% of shares) agreed to merge with Imabari Shipbuilding (with 51% of shares) into a joint venture named Nihon Shipyard (NSY), covering all ship types except Liquefied natural gas (LNG) tankers.[15] This agreement became effective in January 2021. In parallel with the creation of Nihon Shipyard, Imabari Shipbuilding bought 30% of JMU's shares, while IHI and JFE Holdings each kept 35% of JMU's capital. The merger between these two Japanese companies resulted in Nihon Shipyard becoming one of the largest marine-engineering and shipbuilding companies in the world, of which IHI remains a shareholder.

IHI Marine United Tokyo shipyard

Ships built at Tokyo:

IHI Marine United Yokohama shipyard

Ships built at Yokohama:

IHI Marine United Uraga shipyard

Ships built at Uraga:

IHI Amtec shipyard

Ships built at Aioi:

Steel structures

IHI Infrastructure Systems Co., Ltd., an IHI company, designs and constructs steel frame structures, bridges, and watergates.[16]



  1. ^ a b c d e CONSOLIDATED FINANCIAL REPORT FOR THE FISCAL YEAR ENDED MARCH 31, 2017 www.ihi.co.jp accessed 30 May 2021
  2. ^ I. H. Corporation. "Products|IHI Corporation". IHI Corporation. Retrieved 2020-07-29.
  3. ^ Suga, Masumi (20 January 2012). "JFE, IHI to Merge Shipbuilding Units to Survive Competition". Bloomberg.
  4. ^ "IHI Agrees to Transfer IHI Construction Machinery Shares to Kato Works|Industrial Systems and General-purpose Machinery|2016FY|News|IHI Corporation".
  5. ^ IHI-to-shift-output-from-reactor-components-to-plane-parts
  6. ^ "Japan's IHI rigged data for over 4,000 engines at least since 2003". english.kyodonews.net. Kyodo News. Retrieved 29 April 2024.
  7. ^ "IHI Subsidiary Falsifies Data on Engine Performances of Ships and Trains". The Japan News. Retrieved 29 April 2024.
  8. ^ "Energy Systems". IHI. Archived from the original on 2015-05-15. Retrieved 2015-04-11.
  9. ^ "Storage Plants & Process Plants & Pharmaceutical Plants". IHI. Retrieved 2015-04-11.
  10. ^ "Energy Storage". IHI. Retrieved 2016-03-01.
  11. ^ gas_turbine www.ihi.co.jp
  12. ^ aircraft_engines www.ihi.co.jp
  13. ^ "GE Adds Revenue-Sharing Participants for the New GEnx Jet Engine | GE Aviation". www.geaviation.com. Retrieved 2020-07-29.
  14. ^ company/history/index www.ihi.co.jp
  15. ^ Announcement of the conclusion of Agreement regarding Capital and Business Alliance and Establishment of Joint Venture Company www.jmuc.co.jp
  16. ^ "IHI Infrastructure Systems Co., Ltd". ocaji.or.jp. Archived from the original on 19 April 2021. Retrieved 3 February 2020.