In August 1979, Ozaki was selected the Japan U-20 national team for 1979 World Youth Championship. He played in 3 matches as captain. On February 8, 1981, he debuted for the Japan national team against Malaysia. He played at 1982 Asian Games. He played 17 games and scored 3 goals for Japan until 1983. After he moved to Germany in 1983, he was not selected Japan.