| 1870 | - Tsukumo Shokai separates from the Tosa Clan. Yataro Iwasaki is named company chief.
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| 1873 | - Company name changed to Mitsubishi Shokai
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| 1885 | - Yanosuke Iwasaki becomes president.
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| 1887 | - Purchase of Government-owned Nagasaki Shipyard.
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| 1893 | - Mitsubishi Goshi Kaisha is established. Hisaya Iwasaki becomes president.
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| 1905 | - Kobe Mitsubishi Shipyard begins operations.
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| 1914 | - The trade mark of Mitsubishi (three-diamond) is registered.
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| 1916 | - Koyata Iwasaki becomes president.
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| 1917 | - Mitsubishi Shipyard is established.
- Start development of Model-A passenger car
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| 1921 | - Mitsubishi Internal Combustion Engine Manufacturing is established.
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| 1932 | - The "Mitsubishi Fuso bus" is developed.
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| 1934 | - Mitsubishi Shipyard is renamed Mitsubishi Heavy-Industries.
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| 1937 | - A prototype of PX33 military-use 4WD passenger car is produced.
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| 1938 | - Tamagawa kiki Manufacturing (Maruko plant) is establishd.
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