"Solanin" (ソラニン, Soranin) is a song by Japanese rock band, Asian Kung-Fu Generation.

[1] The music was composed by band member Masafumi Gotoh, while the lyrics was written by Inio Asano, creator of the manga of the same name that the film is based on.

The song, which was also inspired by the manga, was used as the ending theme of the film.

[2] "Solanin" was included as an "extra track" on their sixth studio album, Magic Disk, and "Mustang (mix for Meiko)" is included in the band's compilation album Feedback File 2.

[3] The video features the band members walking around a city and playing a gig.