Mitsui is the name of a large Japanese conglomerate, Mitsui Group.
Mitsui may also refer to:
Companies Mitsui & Co., a Japanese general trading company, part of the Mitsui Group Mitsui O.S.K. Lines, a shipping company Mitsui Chemicals Mitsui Fudosan, property firm Mitsui Rail Capital (MRCE), a railway leasing company Mitsui Oil Exploration Mitsui E&S Kinkisharyo-Mitsui, public transit vehicle manufacturer Mitsui Babcock, engineering (boilers) company, now part of Doosan Babcock
Other uses Mitsui (surname) Mitsui family, article about the family of industrialist and merchants Mitsui Golden Glove Award Mitsui Hisashi, character in the "Slam Dunk" anime manga series Mitsui Memorial Museum Mitsui 56-series, a large series of ships built by Mitsui Engineering & Shipbuilding