Mitsui E&S
Japanese builder of licensed low-speed marine engines and propulsion systems (Mitsui E&S).
Tokyo, Japan · Company
About
Mitsui E&S was established on 14 November 1917 as the shipbuilding division of the former Mitsui & Co. in Tamano, Okayama. It became Tama Shipyard in 1937 and Mitsui Shipbuilding & Engineering in 1942, moved to a holding structure as Mitsui E&S Holdings in 2018, and restarted as MITSUI E&S in 2023.
It signed a technical licence with Burmeister & Wain in 1926 and built its first diesel engine in 1928. Cumulative production under one brand reached 124 million horsepower in fiscal 2025.
The head office is at 6-4, Tsukiji 5-chome, Chuo-ku, Tokyo. The group reports 5,998 employees and net sales of 353,196 million yen for the year to March 2026. The company reads E&S as Engineering & Services for Evolution & Sustainability.
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