明石市
However, in 1944, he was drafted into the Imperial Japanese Army, given only three months of rudimentary training and sent to the front line at Mindoro Island in the Philippines, where he served as his battalion's communications technician until his battalion was routed and numerous men killed. In January 1945, he was captured by American forces and sent to a prisoner of war camp on Leyte Island. Survival was very traumatic for Ōoka, who was troubled that he, a middle-aged and, to his way of thinking, unworthy soldier, had survived when so many others had not. He returned to Japan at the end of the year and lived at Akashi, Hyōgo.