Japan's heavy industry evolved from the Meiji government's industrialization policies and wartime military production. Mitsubishi Heavy Industries, Kawasaki Heavy Industries, and IHI form the core, manufacturing national infrastructure including ships, aircraft, power plants, and defense equipment. MHI is Japan's largest heavy industry maker, spanning from the wartime Zero fighter to postwar thermal power turbines and rockets, but its domestically developed regional jet 'Mitsubishi SpaceJet (MRJ)' was abandoned in 2023 after development setbacks, writing off roughly $7 billion. Shipbuilding reached world No. 1 in the 1950s but gradually lost share to South Korean and Chinese price competition. Rising defense spending and energy transition trends provide tailwinds, with gas turbines, nuclear power, and hydrogen technologies expected as growth pillars.
Est. 1917
Mitsubishi Heavy Industries (MHI)
Established in 1917. Originating from the Nagasaki Shipyard acquired by the Mitsubishi zaibatsu, MHI grew into one of Japan's largest heavy industry conglomerates spanning shipbuilding, power systems, aerospace, and defense. After postwar dissolution into three companies and reunification in 1964, it expanded into nuclear power, gas turbines, and fighter aircraft. Despite setbacks including the SpaceJet project cancellation and cruise ship losses, MHI achieved record profits in 2024 driven by GTCC, nuclear, and defense orders.
Established in 1889. Starting as the Ishikawajima Shipyard, IHI diversified into aero engines, turbochargers, and plant engineering. After withdrawing from shipbuilding and concentrating resources on aerospace, defense, and social infrastructure, the company renamed itself IHI and evolved into a comprehensive heavy industry manufacturer.
Est. 1878
Kawasaki Heavy Industries
Founded in 1878. Starting as the Kawasaki Tsukiji Shipyard, the company diversified into naval vessels, aircraft, and railway rolling stock. Split into three companies during postwar zaibatsu dissolution, the firms re-merged in 1969. Expanding the Kawasaki motorcycle brand globally, the company has developed into a comprehensive heavy industry manufacturer with pillars in defense, aircraft components, railway rolling stock, and industrial robots.