滿洲國軍
Instead of getting into teaching, he entered Mukden Military Academy of Manchukuo. After graduation, he became an officer of the Manchukuo Imperial Army, and served in the Gando Special Force. He engaged in guerrilla suppression work in Jiandao (eastern Manchuria, Gando in Korean). He joined the Japanese campaign on northern China for ten months from 1944 to 1945 until its defeat by the Soviet Army.