The Mitsubishi Group, Mitsubishi Group of Companies, or Mitsubishi Companies is a Japanese conglomerate consisting of a range of autonomous businesses which share the Mitsubishi brand, trademark and legacy.
“Mitsubishi” is a combination of the words mitsu and hishi. Mitsu means three and the word hishi is used
to denote a rhombus or diamond shape. Also, japanese often bend the “h” sound to a “b” sound when it
occurs in the middle of a word. So they pronounce the combination of mitsu and hishi as mitsubishi.
At first (1870), three diamonds represented a ship’s propellers. Mitsubishi was started as a shipping firm.
Then it was redesigned and now diamonds look as diamonds.