The Mitsubishi companies, or the Mitsubishi Group of Companies or the Mitsubishi Group is a large group (keiretsu) of independently operated Japanese companies which share the Mitsubishi brand name. While the companies are autonomous, they share the brand name and trademark, as well as a common legacy (in general these companies all descend from the zaibatsu of the same name).

The Mitsubishi group of companies form a loose entity, the Mitsubishi Keiretsu, which is often referenced in US and Japanese media and official reports. A keiretsu is a common feature of Japanese corporate governance and refers to a collaborative group of integrated companies with extensive share crossholdings, personell swaps and strategic co-operation. The top 29 companies are also members of the Mitsubishi Kinyokai, or (Friday Club), and meet monthly. The Mitsubishi.Com Committee is charged with maintaining the overall integrity of the brand as well as maintaining the portal web site.