Na het overlijden van haar vader verhuist Momo naar het oude familiehuis op een afgelegen eiland, alwaar geen winkelcentrum te vinden is, maar slechts houten gebouwen. Behalve dat ze ongelukkig is met haar nieuwe woonomgeving, voelt Momo zich ook ongemakkelijk over een onafgemaakte brief die haar vader heeft achtergelaten met slechts twee woorden: "Lieve Momo." Als ze op de zolder van haar nieuwe huis een antiek boek vindt, vinden er allerlei vreemde gebeurtenissen plaats.
Nee, helaas is ももへの手紙 nog niet beschikbaar op Netflix in Nederland.
| Directing | 沖浦啓之 | Director |
| Writing | 沖浦啓之 | Screenplay |
| Production | 松下慶子 | Producer |
| Production | Motoki Mukaichi | Producer |
| Production | Mariko Noguchi | Producer |
| Production | 岡田有正 | Producer |
| Production | 濱名一哉 | Executive Producer |
| Production | Hiroyuki Ikeda | Executive Producer |
| Production | 石川光久 | Executive Producer |
| Production | Shigeru Watanabe | Executive Producer |
| Sound | 窪田ミナ | Original Music Composer |
| Editing | 植松淳一 | Editor |
| Art | 大野広司 | Art Direction |
| Sound | 佐々木史朗 | Music Producer |
| Sound | 原由子 | Theme Song Performance |
| Visual Effects | 安藤雅司 | Animation Director |
| Visual Effects | Shinya Inoue | Key Animation |
| Art | 沖浦啓之 | Storyboard Artist |
| Camera | 田中宏侍 | Director of Photography |
| Writing | 沖浦啓之 | Original Story |
| Production | 渡邉敬介 | Producer |
| Visual Effects | 安藤雅司 | Character Designer |
| Visual Effects | 安藤雅司 | Key Animation |
| Visual Effects | 青山浩行 | Key Animation |
| Visual Effects | Kouichi Arai | Key Animation |
| Visual Effects | 千葉崇洋 | Key Animation |
| Visual Effects | 濱洲英喜 | Key Animation |
| Visual Effects | 秦綾子 | Key Animation |
| Visual Effects | 本田雄 | Key Animation |
| Visual Effects | 本間晃 | Key Animation |
| Visual Effects | 今井有文 | Key Animation |
| Visual Effects | 井上鋭 | Key Animation |
| Visual Effects | 井上俊之 | Key Animation |
| Visual Effects | 石川真理子 | Key Animation |
| Visual Effects | 伊藤秀樹 | Key Animation |
| Visual Effects | 片桐貴悠 | Key Animation |
| Visual Effects | 川口博史 | Key Animation |
| Visual Effects | 河島裕樹 | Key Animation |
| Visual Effects | 木村貴宏 | Key Animation |
| Visual Effects | 黄瀬和哉 | Key Animation |
| Visual Effects | 小丸敏之 | Key Animation |
| Visual Effects | 小森高博 | Key Animation |
| Visual Effects | 久保田誓 | Key Animation |
| Visual Effects | Ayumi Kurashima | Key Animation |
| Visual Effects | Susumu Mitsunaka | Key Animation |
| Visual Effects | 森田宏幸 | Key Animation |
| Visual Effects | 向田隆 | Key Animation |
| Visual Effects | 西田達三 | Key Animation |
| Visual Effects | 西尾鉄也 | Key Animation |
| Visual Effects | 野村和也 | Key Animation |
| Visual Effects | 沖浦啓之 | Character Designer |
| Visual Effects | Masashi Okumura | Key Animation |
| Visual Effects | Kiyotaka Oshiyama | Key Animation |
| Visual Effects | 斉藤拓也 | Key Animation |
| Visual Effects | 瀬口泉 | Key Animation |
| Visual Effects | 清水洋 | Key Animation |
| Visual Effects | 篠田知宏 | Key Animation |
| Visual Effects | 白石亜由美 | Key Animation |
| Visual Effects | 末冨慎治 | Key Animation |
| Visual Effects | 高田晃 | Key Animation |
| Visual Effects | 高橋英樹 | Key Animation |
| Visual Effects | 竹内敦志 | Key Animation |
| Visual Effects | Teiichi Takiguchi | Key Animation |
| Visual Effects | 田中孝弘 | Key Animation |
| Visual Effects | 徳野悠我 | Key Animation |
| Visual Effects | 山田勝哉 | Key Animation |
| Visual Effects | Makoto Yamada | Key Animation |
| Visual Effects | 山口明子 | Key Animation |
| Visual Effects | 吉田夫美子 | Key Animation |
| Visual Effects | 吉成曜 | Key Animation |
| Visual Effects | 大平晋也 | Key Animation |
| Art | 男鹿和雄 | Background Designer |
| Visual Effects | 大久保徹 | Key Animation |
