science

IHI Corporation

IHI Corporation is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand IHI Corporation rather than just read about it. In short: 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…

Key takeaways

IHI Corporation belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect IHI Corporation to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of IHI Corporation from memory before moving on to harder problems.

Reference excerpt

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. 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.

History 1853 – establishment of Ishikawajima Shipyard by the Mito Domain under order from the Edo Shogunate, who faced the Perry Expedition and the subsequent pressure to compete with the Great Powers, in Ishikawajima, 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 its name to IHI Marine United Ltd. IHI Marine United became the subsidiary of IHI in 2006. 2000 – purchased Nissan's Aerospace and Defense Divisions and established IHI Aerospace Co., Ltd. 2007 – name changed to IHI Corporation. 2008 – Hauzer Techno Coating joins IHI Corporation as PVD coating machine manufacturer 2012 – IHI Corporation acquires Ionbond, provider of innovative coating services 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 2016 – sold all shares of wholly owned IHI Construction Machinery Limited to Kato Works Company Limited. 2018 – IHI halts manufacturing nuclear reactor parts to focus on aircraft parts, leaving Japan Steel Works as the sole Japanese supplier of reactor parts. 2024 – Subsequent to the February report of a company whistleblower; 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 the Ministry of Land, Infrastructure, Transport and Tourism ensued.

Businesses

Energy and resources Energy systems Process plants Energy storage

Gas turbines LM2500 LM6000

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.

In-house development Ishikawajima Ne-20 Ishikawajima-Harima J3 Ishikawajima-Harima F3 Ishikawajima-Harima XF5 IHI Corporation F7, F7-10 IHI Corporation XF9

Joint development IAE V2500 General Electric GEnx General Electric GE90 General Electric CF34 Pratt & Whitney PW1100G-JM

Licensed production General Electric T700 General Electric F110

Parts manufacturing Rolls-Royce Trent

Space products S-type Sounding Rocket (S-210, S-310, S-520, SS-520) M-V Launch Vehicle GX Launch Vehicle (Partner in Galaxy Express Corporation) Epsilon Launch Vehicle SRB-A solid rocket booster for H-IIA/H-IIB Launch Vehicle BT-4 liquid-fuelled apogee motor (used in the Cygnus vehicle which are launched on Atlas V and Antares rockets)

Ships 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. In 1960, Ishikawajima Heavy Industries merged with Harima Shipbuilding & Engineering Company to establish the Ishikawajima-Harima Heavy Industries (IHI). IHI built Mutsu, Japan's first nuclear powered ship with reactors from Mitsubishi Heavy Industries in 1969. 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. 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:

Mutsu, Japan's first nuclear powered vessel 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

IHI Marine United Yokohama shipyard Ships built at Yokohama:

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with IHI Corporation

Start with the simplest possible case. Write down what IHI Corporation claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to IHI Corporation before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about IHI Corporation ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of IHI Corporation

In research: IHI Corporation appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses IHI Corporation in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: IHI Corporation is common in secondary-school and first-year university syllabi. It links to neighbouring topics Aerospace companies, Aerospace companies of Japan, Aircraft engine manufacturers of Japan, so understanding it makes those chapters shorter.
In everyday life: Look for IHI Corporation outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study IHI Corporation in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what IHI Corporation means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain IHI Corporation out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is IHI Corporation in simple terms?

Why does IHI Corporation matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study IHI Corporation?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on IHI Corporation.