, was an admiral in the Imperial Japanese Navy
during World War II
Ōmori Sentarō was born in Kumamoto prefecture
and graduated from the 41st class of the Imperial Japanese Naval Academy
in 1913. He was ranked 16th out of 118 cadets. He served his midshipman
duty aboard the cruiser Azuma
, battleships Kongō
, and was commissioned as an ensign
in 1914. He subsequently served on the Yamashiro
Ōmori returned to school, and became a torpedo expert. He served as lieutenant on the Ashi, Nokaze and the Mutsu before being given his first command: the destroyer Hibiki on 1 December 1923.
Through the 1920 and 1930s, Ōmori subsequently commanded Namikaze, Kamikaze, Yugiri, seaplane tender Kawakami maru, and finally the battleship Ise from 1939-1940, while steadily increasing in rank and returning at regular intervals to torpedo school to remain expert on the latest developments in torpedo technology and tactics. He was promoted to rear admiral on 15 November 1940.
World War II
At the start of World War II
, Ōmori was in command of Destroyer Squadron 1 (DesRon1), which accompanied the main strike force during the attack on Pearl Harbor
. It also participated in the Indian Ocean Raid
of early 1942. During the Battle of Midway
, DesRon1 directed the occupation of Attu Island
in the Battle of the Aleutian Islands
. Omori was subsequently promoted to vice admiral
, and given command of Cruiser Division 5 (CruDiv5). Assigned to the Solomon Islands
, he was ordered to attack American transports off Bougainville Island
in early November 1943. In the resultant Battle of Empress Augusta Bay
November 1 - 2, 1943, the Japanese forces (heavy cruisers Myoko
, light cruisers Agano
, and destroyers Shigure
, and Wakasuki
) suffered a decisive defeat. Ōmori and his heavy cruisers narrowly escaped damage in an air raid at Rabaul
, New Britain
the following day, and retreated to the main Japanese base at Truk
, Caroline Islands
. Ōmori was relieved of his command for having withdrawn at Empress Augusta Bay against an inferior force and was sent back to Japan.
Ōmori became Commandant of the Torpedo School, and was promoted to vice admiral on 1 July 1944. He was director of the Special Attack Division from 13 September 1944 – 10 August 1945, supervising work with the Kaiten human-guided torpedoes. At the very end of World War II, he was appointed Commander in Chief of the IJN 7th Fleet.
Ōmori died on 24 December 1974.
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- McGee, William L. (2002). The Solomons Campaigns, 1942-1943: From Guadalcanal to Bougainville--Pacific War Turning Point, Volume 2 (Amphibious Operations in the South Pacific in WWII). BMC Publications. ISBN 0-9701678-7-3.
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