Masaaki Yuasa Director, Screenwriter Kanon Tani Rû Voice Shôta Shimoda Kai Voice Shin'ichi Shinohara Rû no papa Voice Akira Emoto Jiisan Voice Soma Saito Kunio Voice Minako Kotobuki Yûho Voice Sôichi Abe Mitsuryô seinen Voice Yutaka Aoyama Takobaba Voice Reiko Yoshida Screenwriter Takatsugu Muramatsu Original Music, Music Akihiro Arai Executive Producer Kenji Shimizu Executive Producer Keiji Ôta Executive Producer Junnosuke Itô Producer Yuka Okayasu Producer Ayako Tan Film Editing Stephanie Sheh Casting