IHI Corporation


IHI Corporation
Native name
TypePublic KK
TYO: 7013
IndustryHeavy equipment
Founded5 December 1853; 167 years ago (1853-12-05)
HeadquartersToyosu IHI Building, Tokyo, Japan
Key people
  • Tamotsu Saito (chairman)
  • Tsugio Mitsuoka​ (president and CEO)
ProductsSpace development
Jet engines
Diesel engines
Gas engines
Industrial machinery
Construction 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.


  • 1853 – establishment of Ishikawajima Shipyard in the Chuo district of Tokyo.
  • 1854 - 1856: construction of the Japanese warship Asahi Maru at Ishikawajima shipyard.
  • 1889 – incorporation of Ishikawajima Shipyard as Ishikawajima Shipbuilding & Engineering Co., Ltd.
  • 1907 – establishment of Harima Dock Co., Ltd.
  • 1929 – spinoff of Harima's automobile section as Ishikawajima Automotive Works (later Isuzu through a series of mergers)
  • 1960 – establishment of Ishikawajima-Harima Heavy Industries Co., Ltd. through a merger of Ishikawajima and Harima
  • 1995 – IHI and Sumitomo Heavy Industries merged a warship business and established Marine United Ltd. The Uraga Dock Company was the origin in the shipbuilding of Sumitomo Heavy Industries. It was made by Enomoto Takeaki. However, Sumitomo Heavy Industries moved Uraga Dock to Yokosuka in 2003. IHI moved a shipbuilding section to Marine United in 2002 and changed name to IHI Marine United Ltd. IHI Marine United became the subsidiary of IHI in 2006.
  • 2000 – purchased Nissan Motor’s Aerospace and Defense Divisions and established IHI Aerospace Co., Ltd.
  • 2007 – name changed to IHI Corporation
  • 2013 – Established Japan Marine United Corporation, merging its ship building unit, Marine United Inc., with Universal Shipbuilding Corp. of JFE Holdings after discussion started in April 2008[3]
  • 2018 – IHI stops manufacturing nuclear reactor parts to focus on aircraft parts.,[4] leaving Japan Steel Works as the sole Japanese supplier of reactor parts.


Energy and resources

  • Energy systems[5]
  • Process plants[6]
  • Energy storage[7]

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.[9]

In-house development

Joint development

Licensed production

Parts manufacturing

Space products


Shipbuilding was the founding activity of Ishikawajima in 1853 and is still part of IHI Corporation businesses, although diluted through several mergers with other Japanese shipbuilding companies.[11]

In 1960, Ishikawajima Heavy Industries Co., Ltd. and Harima Shipbuilding & Engineering Co., Ltd. merged to establish Ishikawajima-Harima Heavy Industries Co., Ltd. (IHI). In 1995 Marine United was established jointly with Sumitomo Heavy Industries, Ltd. In 2013 IHI Marine United Inc. was merged with Universal Shipbuilding Corporation owned by the steel company JFE Holdings, Inc., to establish a new, larger company, 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.[12] 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 Corp. and JFE Holdings each kept 35% of JMU's capital. The merger between these two Japanese companies makes Nihon Shipyard one of the largest marine engineering and shipbuilding company in the world, of which IHI Corp. 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.[13]



  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-to-shift-output-from-reactor-components-to-plane-parts
  5. ^ "Energy Systems". IHI. Archived from the original on 2015-05-15. Retrieved 2015-04-11.
  6. ^ "Storage Plants & Process Plants & Pharmaceutical Plants". IHI. Retrieved 2015-04-11.
  7. ^ "Energy Storage". IHI. Retrieved 2016-03-01.
  8. ^ gas_turbine www.ihi.co.jp
  9. ^ aircraft_engines www.ihi.co.jp
  10. ^ "GE Adds Revenue-Sharing Participants for the New GEnx Jet Engine | GE Aviation". www.geaviation.com. Retrieved 2020-07-29.
  11. ^ company/history/index www.ihi.co.jp
  12. ^ Announcement of the conclusion of Agreement regarding Capital and Business Alliance and Establishment of Joint Venture Company www.jmuc.co.jp
  13. ^ "IHI Infrastructure Systems Co., Ltd". ocaji.or.jp. Retrieved 3 February 2020.

External links

  • (in Japanese) Official site
  • (in English) English part of the official site
  • IHI Marin Co., Ltd.
  • IHI Fact Sheet 2008