Tamotsu Oishi
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Captain Tamotsu Oishi of the Aikoku Maru was born in Kochi in 1900, and graduated from the Japanese Naval College in 1920. He then specialized in navigation, and had some ship assignments until his graduation from the advanced course of the Navigation Naval School in 1926. He received his first command in 1938 (gunboat Saga). In October 1940, he was appointed senior staff officer of the 1st Carrier Division. From the following April, he had the same function with the 1st Air Fleet.
As staff officer, he participated in all major carrier operations from Pearl Harbor to Midway, and then took command of the Aikoku Maru in August 1942. On April 3, 1943, he was relieved from his command and held several positions until the end of the war. He died on February 13, 1946 and was promoted on Rear-Admiral posthumously.
Apparently, he was never tried for machinegunning the survivors of the Ondina.