On February 12, 1974, Usui debuted for the Japan national team against Singapore. In 1977, he was selected Japan for 1978 World Cup qualification. He also played at 1978 Asian Games. Although he was not selected Japan after 1980 Summer Olympics qualification, he was selected in 1984 and played at 1984 Summer Olympics qualification. This qualification was his last game for Japan. He played 38 games and scored 15 goals for Japan until 1984.