As part of the rescue, MHI acquired ВҐ50 billion of Mitsubishi Motors stock, increasing its ownership stake to 15 percent and making the automaker an affiliate again. MHI participated in a ВҐ540 billion emergency rescue of Mitsubishi Motors in January 2005, in partnership with Mitsubishi Corporation and Mitsubishi Tokyo Financial Group. In 1974, its Tokyo headquarters was targeted in a bombing that killed eight people. In 1970, MHI's automobile parts department became an independent company as Mitsubishi Motors. The Kobe works was renamed the 'Mitsubishi Heavy Industries - Kobe Shipyard & Machinery Works'. The Nagasaki works was renamed the Nagasaki Shipyard & Engine Works. In 1964, the three independent companies from the 1950 break-up were merged into Shin-Mitsubishi Jukogyo and became Mitsubishi Heavy Industries, Ltd. shin meaning 'New'), while East Japan Heavy-Industries became Mitsubishi Nippon Heavy Industries. (also trading as Mitsubishi Heavy Industries, Reorganized, Ltd. Accordingly, all three companies changed names again on : West Japan Heavy Industries (the Nagasaki Shipyard) was renamed Mitsubishi Shipbuilding & Engineering Co., Ltd., Central Japan Heavy Industries, Ltd. On 28 April 1952 the Occupation of Japan ended, which meant that the ban on using zaibatsu names was lifted. ДЇollowing the dissolution of the zaibatsu after the surrender of Japan at the end of World War II, Mitsubishi divided into three companies in January 1950: Mitsubishi Nagasaki became West Japan Heavy Industries, Ltd, the Kobe Shipyard became Central Japan Heavy-Industries, Ltd., and the Yokohama branch became East Japan Heavy-Industries, Ltd. The Kobe Shipyard constructed the ocean liner Argentina Maru (later repurposed as the aircraft carrier Kaiyo), and the submarines the I-19 and I-25. The Kobe Shipyard merged with Mitsubishi Heavy Industries in 1934. The Kobe Shipyard of Mitsubishi Goshi Kaisha was established in 1905.

This attack, following the atomic bombing of Hiroshima three days earlier, dealt a devastating blow to the Japanese leadership, contributing to the surrender of Japan six days later. These connections made Nagasaki a target for strategic bombing during World War II by the Allied air forces, which later dropped an atomic bomb on the city on August 9, 1945. The company also housed the Mitsubishi Steel and Arms Works, the Akunoura Engine Works, Mitsubishi Arms Plant, Mitsubishi Electric Shipyards and Mitsubishi-Urakami Ordnance Works, which employed 90% of the city's labor force, and accounted for 90% of the city's industry. The largest battleship Musashi was completed at Nagasaki in 1942. From its inception, the Mitsubishi Nagasaki shipyards were heavily involved in contracts for the Imperial Japanese Navy. Mitsubishi Heavy Industries merged with the Yokohama Dock Company in 1935. It became the largest private firm in Japan, active in the manufacture of ships, heavy machinery, airplanes and railway cars. in 1917 and again renamed as Mitsubishi Heavy Industries in 1934. The Nagasaki company was renamed Mitsubishi Shipbuilding & Engineering Company, Ltd. It produced industrial machinery and merchant ships. The 'Mitsubishi Heavy Industries - Shimonoseki Shipyard & Machinery Works' was established in 1914. The works was renamed Mitsubishi Shipyard of Mitsubishi Goshi Kaisha in 1893 and additional dry docks were completed in 18. Its main business was ship repairs, to which it added ship servicing by 1897.

In 1891, 'Mitsubishi Heavy Industries - Yokohama Machinery Works' was started as Yokohama Dock Company, Ltd. Iwasaki purchased the shipyards outright in 1887. In 1884, Yataro Iwasaki, the founder of Mitsubishi, leased the Nagasaki Seitetsusho from the Japanese government, renamed it the Nagasaki Shipyard & Machinery Works and entered the shipbuilding business on a large scale. The first dry dock was completed in 1879. Following the Meiji Restoration of 1868, the shipyard was placed under control of the new Government of Meiji Japan. This was renamed Nagasaki Seitetsusho in 1860, and construction was completed in 1861. In 1857, at the request of the Tokugawa Shogunate, a group of Dutch engineers began work on the Nagasaki Yotetsusho, a modern, Western-style foundry and shipyard near the Dutch settlement of Dejima, at Nagasaki. The Big Cranes at The Mitsubishi Dockyard Nagasaki, Meiji Period

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