Many of the songs were in collaboration with artists previously worked with. "Shimadachi" was written by Tetsuya Murakami of The Gospellers (Natsukawa collaborated with Gospellers members Yutaka Yasuoka and Kaoru Kurosawa on her former album "Kaze no Michi"). "Tamachiyu no Ashibi" was written in collaboration with Parsha Club guitarist Masaaki Uechi ("Tsuki no Niji" on Kaze no Michi was written by him also).
