 | Moka Kamishiraishi als Kun (voice) |
 | Haru Kuroki als Mirai (voice) |
 | Gen Hoshino als Father (voice) |
 | Kumiko Aso als Mother (voice) |
 | Mitsuo Yoshihara als Mysterious Man (voice) |
 | Yoshiko Miyazaki als Grandmother (voice) |
 | Koji Yakusho als Grandfather (voice) |
 | Masaharu Fukuyama als Young Man (voice) |
 | Kaede Hondo als Baby Mirai (voice) |
| Mamoru Hosoda | Director |
| Shigeru Nishiyama | Editor |
| Yuichiro Saito | Producer |
| Yuichi Adachi | Producer |
| Masakatsu Takagi | Original Music Composer |
| Takuya Ito | Producer |
| Nozomu Takahashi | Production Manager |
| Daisuke Iga | Costume Design |
| Genki Kawamura | Producer |
| Anri Jojo | Production Design |
| Hitoshi Ito | Associate Producer |
| Hiroomi Yamakawa | Key Animation |
| Tatsuro Yamashita | Theme Song Performance |
| Kosuke Hayashi | Background Designer |
| Takashi Omori | Art Direction |
| Yohei Takamatsu | Art Direction |
| Atsuko Nozaki | Key Animation |
| Atsuko Tanaka | Key Animation |
| Fumie Imai | Key Animation |
| Harumi Takagi | Key Animation |
| Hideki Hamasu | Key Animation |
| Hiroshi Kawaguchi | Key Animation |
| Izumi Seguchi | Key Animation |
| Katsuyoshi Nakatsuru | Key Animation |
| Kazutaka Ozaki | Key Animation |
| Kenji Hachizaki | Key Animation |
| Mariko Yamamoto | Key Animation |
| Masafumi Yokota | Key Animation |
| Masaru Ooshiro | Key Animation |
| Misato Hamada | Key Animation |
| Naoki Tate | Key Animation |
| Ryosuke Nishii | Key Animation |
| Satoko Morikawa | Key Animation |
| Shinichiro Yamada | Key Animation |
| Shougo Furuya | Key Animation |
| Tadashi Sakazaki | Key Animation |
| Takayuki Hamada | Key Animation |
| Takeshi Inamura | Key Animation |
| Tatsuya Tomaru | Key Animation |
| Tomoaki Takase | Key Animation |
| Yoshihiro Kitano | Key Animation |
| Yuka Koiso | Key Animation |
| Ayako Hata | Animation Director |
| Ryo Horibe | CGI Director |
| Hiroyuki Aoyama | Character Designer |
| Toshimasa Ishii | Assistant Director |
| Uken Ryu | Background Designer |
| Yumi Ishii | Background Designer |
| Yoshikazu Fukutome | Background Designer |
| Satoko Nakamura | Background Designer |
| Ryoko Ina | Background Designer |
| Risa Iwatsuki | Background Designer |
| Osamu Nakajima | Background Designer |
| Naomi Kasugai | Background Designer |
| Kurumi Katayama | Background Designer |
| Kiyoshi Sameshima | Background Designer |
| Kiyomi Oota | Background Designer |
| Kikuyo Yano | Background Designer |
| Kazuo Oga | Background Designer |
| Katsushi Aoki | Background Designer |
| Yoji Takeshige | Background Designer |
| Yuka Nitta | Background Designer |
| Daigo Ikeda | Line Producer |
| Kei Kushiyama | Associate Producer |
| Yuya Machida | Associate Producer |
| Shuzo Kasahara | Associate Producer |
| Yoshio Obara | Sound Recordist |
| Kenji Shibasaki | Sound Effects |
| Osamu Mikasa | Color Designer |
| Takaaki Yamashita | Layout Supervisor |
| Makoto Tanijiri | Production Design |
| Tatsuya Kameyama | Production Design |
| Atsuko Nakagawa | Production Design |
| Yoshitaka Kameda | Production Design |
| Reio Ono | Production Design |
| Mamoru Hosoda | Screenplay |
| Mamoru Hosoda | Original Story |
| Harumi Ikeya | Background Designer |
| Misato Takikawa | Assistant Editor |
| Kyoko Kitahara | Music Producer |
| Natsuko Inoue | Foley Artist |
| Sakura Katsumata | Foley Artist |
| Masaru Ohgawara | Foley Artist |
| Kai Hasako | Production Assistant |
| Mirai Kase | Publicist |
| Ayaka Minami | Online Editor |
| Hiroyuki Aoyama | Animation Director |
| Yoshinobu Obida | Publicist |
| Kazunori Shimizu | Music Editor |
