山下達郎
The film's theme song, titled , was written and performed by Tatsuro Yamashita. It was released by Warner Music Japan as a maxi single on August 19, 2009. The single included two other songs by Yamashita that are unrelated to the film. The first two songs have corresponding karaoke versions, and the third song is recorded from a live performance. The single peaked at 8th place on the Oricon charts.