Mitsubishi Heavy Industries, Ltd. (MHI) is a Japanese multinational engineering, electrical equipment and electronics company headquartered in Tokyo, Japan. MHI is one of the core companies of the Mitsubishi Group.

MHI’s products include aerospace components, air conditioners, aircraft, automotive components, forklift trucks, hydraulic equipment, machine tools, missiles, power generation equipment, printing machines, ships and space launch vehicles.

The history of the conglomerate dates back to 1857 when at the request of the Japanese government, a team of Dutch engineers began work on the Nagasaki Yotetsusho, a modern, Western-style foundry and shipyard near the Dutch settlement of Dejima, at Nagasaki. This was renamed Nagasaki Seitetsusho in 1860, and construction was completed in 1861. In 1884, Nagasaki Seitetsusho was leased to the Japanese government and renamed the Nagasaki Shipyard & Machinery Works and fully entered the shipbuilding business.

In 1891, Mitsubishi Heavy Industries – Yokohama Machinery Works was started as Yokohama Dock Company, Ltd. Its main business was ship repairs, to which it added ship servicing by 1897. The works was renamed Mitsubishi Shipyard of Mitsubishi Goshi Kaisha in 1893 and additional dry docks were completed in 1896 and 1905.

At the end of the Second World War, Mitsubishi divided into three companies. Mitsubishi Nagasaki became West Japan Heavy Industries, Ltd. The Nagasaki Shipyard was renamed Mitsubishi Shipbuilding & Engineering Co., Ltd. in 1952. The Mitsubishi Kobe Shipyard became Central Japan Heavy Industries, Ltd. in 1950.

In 1964, the three independent companies from the post-World War II split-up were merged again into one company under the name of Mitsubishi Heavy Industries, Ltd.





Shipbuilding has been a core and historical founding activity for Mitsubishi Heavy Industries. It was formally started in 1884 when Mitsubishi leased and then acquired the ‘Nagasaki Shipyard & Machinery Works’ company (founded in 1857 as ‘Nagasaki Yotetsusho Foundry’). Subsequently, Mitsubishi progressively became one of the major Japanese shipbuilding companies, building both commercial as well as military ships, including the Yamato-class battleship, Musashi and Yamato, of the Imperial Japanese Navy during World War II.

On 1 December, 2017, Mitsubishi Heavy Industries, Ltd. (MHI) announced that it will launch two new wholly owned companies on 1 January, 2018 in conjunction with reorganization of its shipbuilding business:

– A new subsidiary, Mitsubishi Shipbuilding Co., Ltd., was created to primarily undertake construction of ships that require intensive outfitting and advanced technologies, mainly based on the Yokohama, Shimonoseki and Nagasaki shipyards.

– Separately, Mitsubishi Heavy Industries Marine Structure Co., Ltd. will mainly engage in the manufacture of large ships and marine structures.