Sekai no Yakusoku (世界の約束; The Promise of the World)

"Sekai no Yakusoku" (世界の約束, "The Promise of the World") is the theme song of Howl's Moving Castle, the 2004 Studio Ghibli film directed by Hayao Miyazaki. It is sung by Chieko Baisho, who voices Sophie in the film.

The music is by Youmi Kimura and the lyrics are by the poet Shuntarō Tanikawa.