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Kana Hanazawa as Miyu (voice) |
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Shintaro Asanuma as Daru (voice) |
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Sayuri Yahagi as Chika (voice) |
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Akiko Hiramatsu as Miyu's Mother (voice) |
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Hiromichi Tezuka as Narrator (voice) |
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Shino Shimoji as Elementary School Student (voice) |
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Shun Horie as Junior High School Student (voice) |
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Makoto Shinkai as Chobi (voice) |
| Sound | Yota Tsuruoka | Sound |
| Visual Effects | Chimoto Umishima | Character Designer |
| Writing | Naruki Nagakawa | Writer |
| Visual Effects | Chimoto Umishima | Animation Department Coordinator |
| Art | 坂本一也 | Storyboard Artist |
| Art | 太田里香 | Storyboard Artist |
| Art | 佐川遥 | Paint Coordinator |
| Art | 田中孝典 | Art Direction |
| Writing | Makoto Shinkai | Original Story |
| Directing | 坂本一也 | Director |
