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Imperial Japanese Navy order of battle 1941

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Order of battle

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IJN at time of Pearl Harbor Attack in December 1941:

  • 10 (plus 3 building) (1)
    • 4 Kongō class — converted from battlecruisers. Built in 1913–1915.
    • 2 Fusō class — built 1915-1917
    • 2 Ise class — built 1917-1918
      • Ise — †July, 1945
      • Hyūga — run aground in July, 1945
    • 2 Nagato class — built 1920-1921
    • 0 Yamato class (3 building (1 converted to aircraft carrier Shinano) and 1 cancelled later in 1941).
      • Yamato — commissioned 1941, † 1945
      • Musashi — commissioned 1942, † 1944
      • The fourth of the class, Hull Number 111 was scrapped in 1942 when only 30% complete, and a proposed fifth hull, Number 797, proposed in the 1942 5th Supplementary Program, was never ordered.
(1) Does not include Imperial Japanese Army built aircraft transports.
(2) Amagi — sister ship to Akagi both as a battlecruiser and as a conversion to an aircraft carrier, was destroyed during construction by an earthquake and replaced with the Kaga.

(1) Ibuki ordered but not laid down (2) Mogamis designated light cruisers but were built to be up-gunned as heavies once the London Naval Treaty was broken.

  • 20 (plus 5 building) (1)

(1) 4 Agano and 2 Ōyodo (1 cancelled).

(1) 27 Yūgumo class and 16 Akizuki-class building (2) Others ships of the Momi-class were re-rated as patrol vessels. Also, note than Momi name was assigned in 1944 to a Matsu-class destroyer ship

Others

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Merchant ships

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Many under direct navy control as armed merchantmen.

  • 1939 - 2,337 with 5,629,845 tons
  • World War II construction of 4,250,000 tons
  • 2,346 sunk

Aircraft

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Commanders

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Imperial Japanese Navy commanders at the time of the Attack on Pearl Harbor:

See also

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Notes

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