"Seisyun" is the thirty-ninth single by the Japanese band Tokio, released on November 28, 2007.
It topped the Oricon weekly charts and charted for twelve weeks.
[1] The song "Seisyun" was used as the theme song to Utahime, a drama show Tomoya Nagase starred in.
"Seisyun" was released in three different versions: