In May 1973, Seta was selected Japan national team for 1974 World Cup qualification. At this competition, on May 22, he debuted against Hong Kong. He also played at 1974 Asian Games. In 1976, he played as a regular goalkeeper and played in all matches at 1976 Summer Olympics qualification. In 1980, he played for Japan for the first time in 4 years at 1980 Summer Olympics qualification. This qualification was his last game for Japan. He played 25 games for Japan until 1980.