Okazaki participated in the 1924 Paris Olympic Summer Games, qualifying for the 5,000 m final with a time of 15.22.2e. In the final, he fainted in the heatwave and was carried away by medics. He had much success at the Far Eastern Championship Games, winning the mile run at the 1921 Games then doing a middle-distance double in the mile and 880 yards at the 1923 event in Osaka.