Unhappy after his new baby sister displaces him, four-year-old Kun begins meeting people and pets from his family's history in their unique house in order to help him become the big brother he was meant to be.
Unfortunately the movie Mirai is not yet available on HBO Max.
| Production | Mirai Kase | Publicist |
| Editing | Ayaka Minami | Online Editor |
| Production | Hitoshi Ito | Associate Producer |
| Visual Effects | Hiroyuki Aoyama | Animation Director |
| Art | Kosuke Hayashi | Background Designer |
| Art | Takashi Omori | Art Direction |
| Art | Yohei Takamatsu | Art Direction |
| Visual Effects | Hiroomi Yamakawa | Key Animation |
| Sound | Tatsuro Yamashita | Theme Song Performance |
| Visual Effects | Naoki Tate | Key Animation |
| Art | Yumi Ishii | Background Designer |
| Art | Osamu Nakajima | Background Designer |
| Visual Effects | Atsuko Tanaka | Key Animation |
| Visual Effects | Kazutaka Ozaki | Key Animation |
| Art | Kurumi Katayama | Background Designer |
| Art | Kiyomi Ota | Background Designer |
| Visual Effects | Kenji Hachizaki | Key Animation |
| Visual Effects | Masaru Ohshiro | Key Animation |
| Visual Effects | Satoko Morikawa | Key Animation |
| Visual Effects | Takayuki Hamada | Key Animation |
| Visual Effects | Hideki Hamasu | Key Animation |
| Art | Naomi Kasugai | Background Designer |
| Art | Kiyoshi Sameshima | Background Designer |
| Visual Effects | Tadashi Sakazaki | Key Animation |
| Art | Satoko Nakamura | Background Designer |
| Art | Risa Iwatsuki | Background Designer |
| Visual Effects | Takeshi Inamura | Key Animation |
| Directing | Toshimasa Ishii | Assistant Director |
| Visual Effects | Fumie Imai | Key Animation |
| Visual Effects | Mariko Yamamoto | Key Animation |
| Visual Effects | Shougo Furuya | Key Animation |
| Visual Effects | Ayako Hata | Animation Director |
| Art | Katsushi Aoki | Background Designer |
| Art | Yoji Takeshige | Background Designer |
| Art | Yuka Nitta | Background Designer |
| Visual Effects | Hiroshi Kawaguchi | Key Animation |
| Visual Effects | Masafumi Yokota | Key Animation |
| Visual Effects | Ryosuke Nishii | Key Animation |
| Visual Effects | Shinichiro Yamada | Key Animation |
| Visual Effects | Hiroyuki Aoyama | Character Designer |
| Visual Effects | Atsuko Nozaki | Key Animation |
| Visual Effects | Harumi Takagi | Key Animation |
| Visual Effects | Tatsuya Tomaru | Key Animation |
| Visual Effects | Katsuyoshi Nakatsuru | Key Animation |
| Art | Uken Ryu | Background Designer |
| Visual Effects | Yuka Koiso | Key Animation |
| Art | Yoshikazu Fukutome | Background Designer |
| Visual Effects | Izumi Seguchi | Key Animation |
| Visual Effects | Misato Hamada | Key Animation |
| Visual Effects | Tomoaki Takase | Key Animation |
| Visual Effects | Ryo Horibe | CGI Director |
| Art | Ryoko Ina | Background Designer |
| Art | Kikuyo Yano | Background Designer |
| Visual Effects | Yoshihiro Kitano | Key Animation |
| Art | Kazuo Oga | Background Designer |
| Art | Makoto Tanijiri | Production Design |
| Art | Yoshitaka Kameda | Production Design |
| Sound | Yoshio Obara | Sound Recordist |
| Art | Tatsuya Kameyama | Production Design |
| Visual Effects | Takaaki Yamashita | Layout Supervisor |
| Visual Effects | Osamu Mikasa | Color Designer |
| Art | Atsuko Nakagawa | Production Design |
| Sound | Sakura Katsumata | Foley Artist |
| Production | Shuzo Kasahara | Associate Producer |
| Art | Reio Ono | Production Design |
| Writing | Mamoru Hosoda | Screenplay |
| Sound | Kyoko Kitahara | Music Producer |
| Sound | Masaru Ohgawara | Foley Artist |
| Production | Daigo Ikeda | Line Producer |
| Production | Kei Kushiyama | Associate Producer |
| Sound | Kenji Shibasaki | Sound Effects |
| Production | Yuya Machida | Associate Producer |
| Sound | Natsuko Inoue | Foley Artist |
| Art | Harumi Ikeya | Background Designer |
| Writing | Mamoru Hosoda | Original Story |
| Editing | Misato Takikawa | Assistant Editor |
| Production | Kai Hasako | Production Assistant |
| Production | Yoshinobu Obida | Publicist |
| Sound | Kazunori Shimizu | Music Editor |
| Directing | Mamoru Hosoda | Director |
| Production | Seiko Oguchi | Casting Director |
| Production | Yuichiro Saito | Producer |
| Production | Yuichi Adachi | Producer |
| Production | Takuya Ito | Producer |
| Sound | Masakatsu Takagi | Original Music Composer |
| Production | Genki Kawamura | Producer |
| Editing | Shigeru Nishiyama | Editor |
| Production | Nozomu Takahashi | Production Manager |
| Costume & Make-Up | Daisuke Iga | Costume Design |
| Art | Anri Jojo | Production Design |
| Sound | Kenji Ashimoto | Orchestrator |
