Mitsui is the name of a large Japanese conglomerate, Mitsui Group.

Mitsui may also refer to:

• 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 Co.
• Mitsui Engineering & Shipbuilding
• Kinkisharyo-Mitsui, public transit vehicle manufacturer
• Mitsui Babcock, engineering (boilers) company, now part of Doosan Babcock

• 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

This disambiguation page lists articles associated with the title Mitsui.
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