What type of "informal business group" is the Mitsubishi company considered to be an example of?
Mitsubishi: The Mitsubishi Group (三菱グループ , Mitsubishi Gurūpu , also known as the Mitsubishi Group of Companies or Mitsubishi Companies, and informally as the Mitsubishi "Keiretsu") is a group of autonomous Japanese multinational companies in a variety of industries. Keiretsu: A keiretsu ( , literally "system", "series", "grouping of enterprises", "order of succession") is a set of companies with interlocking business relationships and shareholdings. Keiretsu:  It is a type of informal business group. Keiretsu:  The "keiretsu" maintained dominance over the Japanese economy for the second half of the 20th century.
keiretsu