1888:  The company is launched as a machinery production and repair shop for the Besshi Copper Mine

1928: Name changed to Sumitomo Besshi Copper Mine, Ltd. – Niihama Works

1940: Named changed to Sumitomo Machinery Industries Co., Ltd.

1949: Listed on the Tokyo and Osaka Stock Exchanges

1958: Listed on the Nagoya Stock Exchanges

1962: Hiratsuka Laboratory opens

1969: Sumitomo Machinery Industries Co., Ltd. and Uraga Heavy Industries Co., Ltd. merge to form Sumitomo Heavy Industries, Ltd.

1971: Establishment of Oppama Shipyard (currently known as Yokosuka Works)

1972: Delivers the Company’s first cyclotron

1973: Establishment of the Ohshima Shipyard and Toyo Works

1976: Malaysia Shipyard & Engineering is established

1980: Develops miniature cyclotron for use in medical diagnostics

1982: Delivers first gas turbine-equipped naval escort vessel, the Hatsuyuki

1984: Delivers first all-Japanese made training ship, the Nihonmaru

1989: Acquires Lumonix, a Canadian manufacturer of laser devices

1991: Delivers world’s first 95,000 ton, two-tiered tanker

1995: Delivers a large-scale experimental ship, the Asuka

2000: Reorganizes the Main Research and Development Center to form the current Research and Development Center

2005: Issues JPY 10 billion worth of straight corporate bonds with a 5-year maturity period

2010: Establishment of Sumitomo Heavy Industries Business Associates Co., Ltd.

2015: Sumitomo Heavy Industries Material Handling Systems Co., Ltd. takes over the industrial crane business from Mitsubishi Heavy Industries Machinery Technology Corporation

2017: Acquired 100% ownership of Persimmon Technologies