Minoru Ota
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Rear Admiral Ota Minoru (大田 実 Ōta Minoru, 1919 - 1945) commanded the Naval Base Force that defended the Oroku Peninsula on Okinawa. On 11 June 1945, the U.S. 6th Marine Division encircled the Naval Base Force and Ota sent his farewell telegram to the 32nd Army Headquarters at 1600 hours, 12 June. On 13 June, Ota committed suicide.
Source: Huber, Thomas M. Japan's Battle of Okinawa, April-June 1945. Leavenworth Papers N° 18. ISSN 0195-3451. 1990.