Mitsui E&S is the largest supplier of gantry cranes in Japan with a market share of nearly 90 per cent, and its products are used at major ports such as Long Beach, Los Angeles, Mombasa, Ho Chi Minh, and Klang.With its success, it began manufacturing diesel engines under a license agreement with Burmeister & Wain in Denmark.Mitsui E&S acquired Burmeister & Wain's engineering and construction business in 1990, and through this acquisition, it also acquired Burmeister's boiler business in 2017, which primarily caters to small and medium biomass power plants.[9] Tsuneishi took over a majority stake of the merchant shipbuilding business in 2022 as Mitsui E&S refocused its strategy on marine engines, port cranes, and other machinery.On 22 February 2024, the White House announced that as part of its 20-billion-dollar scheme to upgrade and secure the country's port infrastructure, Mitsui E&S and PACECO are planning to resume manufacturing cranes in the US.