On January 28, 1976, Saito debuted for the Japan national team against Bulgaria. He played as regular player at 1976 Summer Olympics qualification and 1978 World Cup qualification. He was also selected for Japan for 1978 Asian Games. In 1984, he played for Japan for the first time in 6 years. 1984 Summer Olympics qualification was his last game for Japan. He played 32 games for Japan until 1984.