Kono appeared on on the cover of the August 1955 issue of Strength and Health magazine. In October 1955, he would go on to win gold in the light-heavyweight (82.5 kg) class at the World Championships held in in Munich, West Germany. Kono’s winning total was 435 kg, and consisted of a 142.5 kg press, a 127.5 kg snatch and a 165 kg clean and jerk.