IHI Corporation (株式会社IHI,Kabushiki-gaisha IHI), formerly known asIshikawajima-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 inTokyo,Japan that produces and offersships,space launch vehicles,aircraft engines,marinediesel engines,gas turbines,gas engines, railway systems,turbochargers forautomobiles, plant engineering, industrial machinery,power station boilers and other facilities,suspension bridges and other structures.^[2]

IHI Corporation

Native name	株式会社IHI
Company type	PublicKK
Traded as	TYO:7013
Industry	Heavy equipment
Founded	5 December 1853; 171 years ago (1853-12-05)
Headquarters	Toyosu IHI Building,Tokyo,Japan
Key people	Tsugio Mitsuoka [jp] (chairman) Hiroshi Ide [jp] (president and CEO)
Products	Space development Jet engines Diesel engines Gas engines Industrial machinery Bridge & steel structures Energy systems etc
Revenue	¥1486.33 billion (2016)[1]
Operating income	¥47.39 billion (2016)[1]
Net income	¥5.25 billion (2016)[1]
Total assets	¥1692.83 billion (2016)[1]
Total equity	¥309.99 billion (2016)[1]
Owner	DKB Group
Number of employees	26,618 (2013)
Parent	Dai-ichi Life (3.49%)
Website	ihi.co.jp

IHI is listed on theTokyo Stock Exchange Section 1. Following the reporting of a companywhistleblower in February 2024, on April 24, 2024, the company announced that investigation was underway by theMinistry 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.

• 1853 – establishment of Ishikawajima Shipyard by theMito Domain under order from theEdo Shogunate, who faced thePerry Expedition and the subsequent pressure to compete with theGreat Powers, in Ishikawajima, Chuo district of Tokyo.
• 1854–1856 – construction of theJapanese warshipAsahi 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 (laterIsuzu through a series of mergers)
• 1960 – establishment ofIshikawajima-Harima Heavy Industries Co., Ltd. through a merger of Ishikawajima and Harima
• 1995 – IHI andSumitomo Heavy Industries merged a warship business and established Marine United Ltd. TheUraga Dock Company was the origin in the shipbuilding of Sumitomo Heavy Industries. It was made byEnomoto Takeaki. However, Sumitomo Heavy Industries moved Uraga Dock to Yokosuka in 2003. IHI moved a shipbuilding section to Marine United in 2002 and changed its name toIHI Marine United Ltd. IHI Marine United became the subsidiary of IHI in 2006.
• 2000 – purchasedNissan Motor's Aerospace and Defense Divisions and establishedIHI Aerospace Co., Ltd.
• 2007 – name changed to IHI Corporation.
• 2008 –Hauzer Techno Coating joins IHI Corporation asPVD coating machine manufacturer
• 2012 – IHI Corporation acquiresIonbond, provider of innovative coating services
• 2013 – establishedJapan Marine United Corporation, merging its ship building unit, Marine United Inc., with Universal Shipbuilding Corp. ofJFE Holdings after discussion started in April 2008^[3]
• 2016 – sold all shares of wholly owned IHI Construction Machinery Limited to Kato Works Company Limited.^[4]
• 2018 – IHI halts manufacturing nuclear reactor parts to focus on aircraft parts,^[5] leavingJapan Steel Works as the sole Japanese supplier of reactor parts.
• 2024 – Subsequent to the February report of a company whistleblower;^[6] on April 24, IHI Corp. announced that its subsidiary, IHI Power Systems Co., had been falsifying fuel consumption and efficiency data of engines used in ships and trains since 2003, affecting 4,361 engines. Investigation by theMinistry of Land, Infrastructure, Transport and Tourism ensued.^[7]

• Energy systems^[8]
• Process plants^[9]
• Energy storage^[10]

• LM2500^[11]
• LM6000

IHI develops, manufactures, and maintainsaero engines, either by joint projects of which partners includeGE Aviation,Pratt & Whitney, andRolls-Royce Holdings, or the company itself.^[12]

• Ishikawajima Ne-20
• Ishikawajima-Harima J3
• Ishikawajima-Harima F3
• Ishikawajima-Harima XF5
• IHI Corporation F7, F7-10
• IHI Corporation XF9

• IAE V2500
• General Electric GEnx
• General Electric GE90^[13]
• General Electric CF34
• Pratt & Whitney PW1100G-JM

• General Electric T700
• General Electric F110

• Rolls-Royce Trent

• S-type Sounding Rocket (S-210,S-310,S-520, SS-520)
• M-V Launch Vehicle
• GX Launch Vehicle (Partner inGalaxy Express Corporation)
• Epsilon Launch Vehicle
• SRB-A solid rocket booster forH-IIA/H-IIB Launch Vehicle
• BT-4 liquid-fuelled apogee motor (used in theCygnus vehicle which are launched onAtlas V andAntares rockets)

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 withSumitomo Heavy Industries. In 2013, IHI Marine United was merged with Universal Shipbuilding Corporation owned by the steel companyJFE 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 withImabari Shipbuilding (with 51% of shares) into a joint venture namedNihon Shipyard (NSY), covering all ship types exceptLiquefied 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 andJFE 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.

Ships built atTokyo:

• Murasame (DD-101),Murasame-class destroyer
• Samidare (DD-106),Murasame class
• Akebono (DD-108),Murasame class
• Hiei (DDH-142),Haruna-class destroyer
• Tokiwa (AOE-423),Towada-class replenishment ship
• Asagiri (DD-151),Asagiri-class destroyer
• Amagiri (DD-154),Asagiri class
• Umigiri (DD-158),Asagiri class
• Sawayuki (DD-125),Hatsuyuki-class destroyer
• Isoyuki (DD-127),Hatsuyuki class
• Matsuyuki (DD-130),Hatsuyuki class
• Shirane (DDH-143),Shirane-class destroyer
• Kurama (DDH-144),Shirane class
• Chōkai (DDG-176),Kongō-class destroyer

Ships built atYokohama:

• Makinami (DD-112),Takanami-class destroyer
• Suzunami (DD-114),Takanami class
• Hyūga (DDH-181),Hyūga-class helicopter destroyer
• Ise (DDH-182),Hyūga class
• Izumo (DDH-183),Izumo-class helicopter destroyer
• Kaga (DDH-184),Izumo class

Ships built atUraga:

• Takanami (DD-110),Takanami-class destroyer
• Yūdachi (DD-103),Murasame-class destroyer
• Tenryū (ATS-4203), a training support vessel
• Asuka (ASE-6102), a test ship

Ships built atAioi:

• SSTH Ocean Arrow, a civilian ship

IHI Infrastructure Systems Co., Ltd., an IHI company, designs and constructssteel frame structures, bridges, andwatergates.^[16]

• Akashi-Kaikyo Bridge (Hyogo, Japan)
• Tatara Bridge (Hiroshima, Japan)
• Tokyo Bay Aqua-Line (Tokyo and Chiba, Japan)
• Second Bosporus Bridge (Istanbul, Turkey)
• Binh Bridge (Hanoi, Vietnam)
• Carquinez Bridge (California, U.S.A)
• Strait of Messina Bridge (Messina, Italy, Design phase completed)
• Osman Gazi Bridge (Turkey)
• Auckland Harbour Bridge lane clip-on expansions (New Zealand)
• Braila Bridge (Braila, Romania, Underconstruction. To be completed in 2022)

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