British Commonwealth Occupation Force
After the war ended, Ruxton volunteered to serve in Japan with the British Commonwealth Occupation Force. He was posted to the 65th Infantry Battalion, part of the 34th Australian Infantry Brigade, and was deployed to Japan in early 1946. In late 1947, Ruxton attended the British Commonwealth Occupation Force School of Cookery and qualified as an army cook, after which he was transferred to the Australian Army Catering Corps. He served in Japan until December 1948 when he returned to Australia. He was discharged from the Army on 13 January 1949.