The movie of Natsume's Book of Friends series. Natsume has been busy, navigating between humans and Yokai when he coincidentally reunites with an old classmate, Yuki. It brings back painful memories of a certain Yokai. Meanwhile, Natsume also became acquainted with Yorie Tsumura, a woman in the memories of a Yokai whose name he had returned. Yorie knew much about Reiko, but now lived a peaceful life with her only son, Mukuo. Being with this family was comforting for Natsume, but apparently a mysterious Yokai has been lurking in their town. On the way back from investigating, a "Yokai seed" that had latched itself to Nyanko Sensei drops into the Fujiwaras' garden and grows overnight into a fruit tree. When Nyanko Sensei eats a fruit that is somehow shaped like himself, he suddenly splits into three!
Unfortunately the movie Natsume's Book of Friends: Ephemeral Bond is not yet available on HBO Max.
| Sound | Makoto Yoshimori | Original Music Composer |
| Production | Noriko Iwasaki | Associate Producer |
| Visual Effects | Ena Nishikawa | Animation Director |
| Visual Effects | Miyuki Ooshiro | Animation Director |
| Directing | Miyuki Ooshiro | Second Unit Director |
| Directing | Takahiro Omori | Director |
| Visual Effects | Miyuki Ooshiro | Key Animation |
| Visual Effects | Orie Tanaka | Key Animation |
| Visual Effects | Orie Tanaka | Animation Director |
| Visual Effects | Hideyuki Motohashi | Key Animation |
| Visual Effects | Tomomi Shimazaki | Key Animation |
| Visual Effects | Madoka Katto | Key Animation |
| Art | Miyuki Ooshiro | Storyboard Artist |
| Visual Effects | Natsuko Kondou | Animation Director |
| Visual Effects | Hiroto Yokote | Key Animation |
| Visual Effects | Jun Maeda | Key Animation |
| Visual Effects | Toshinari Yamashita | Key Animation |
| Visual Effects | Eri Yamazaki | Key Animation |
| Visual Effects | Megumi Miyagawa | Key Animation |
| Visual Effects | Naoko Hayashi | Key Animation |
| Visual Effects | Mayumi Nakamura | Key Animation |
| Visual Effects | Emi Nakamura | Key Animation |
| Visual Effects | Rie Maehara | Key Animation |
| Visual Effects | Shinsuke Ishikawa | Key Animation |
| Visual Effects | Wataru Abe | Key Animation |
| Visual Effects | Eri Nishikawa | Key Animation |
| Visual Effects | Toshie Kawamura | Key Animation |
| Visual Effects | Tomomi Ishii | Key Animation |
| Visual Effects | Masahisa Koyata | Key Animation |
| Visual Effects | Kenji Hayama | Animation Director |
| Visual Effects | Miki Urashima | Key Animation |
| Visual Effects | Atsushi Aono | Key Animation |
| Visual Effects | Kenji Hayama | Key Animation |
| Visual Effects | Kayo Daibou | Key Animation |
| Visual Effects | Masahiro Koyama | Key Animation |
| Visual Effects | Yoriko Goto | Key Animation |
| Visual Effects | Shintaro Doge | Key Animation |
| Visual Effects | Michiko Asada | Key Animation |
| Visual Effects | Hiroshi Tomioka | Key Animation |
| Visual Effects | Eri Yamazaki | Animation Director |
| Visual Effects | Masami Gouda | Key Animation |
| Visual Effects | Misao Abe | Key Animation |
| Visual Effects | Yang Peng | Key Animation |
| Visual Effects | Emi Ikebuchi | Key Animation |
| Visual Effects | Yasuhiro Saiki | Key Animation |
| Visual Effects | Fumiyo Kimura | Key Animation |
| Visual Effects | Miyako Kano | Key Animation |
| Visual Effects | Terumi Muto | Key Animation |
| Visual Effects | Ryo Tanaka | Key Animation |
| Visual Effects | Maho Takagi | Key Animation |
| Visual Effects | Kazune Suzuki | Key Animation |
| Visual Effects | Tomoyo Kamoi | Key Animation |
| Visual Effects | Mamie Ashikaga | Key Animation |
| Sound | Masafumi Watanabe | Foley Artist |
| Visual Effects | Shoko Harada | Compositing Artist |
| Visual Effects | Toshihiro Fujita | Compositing Artist |
| Visual Effects | Kim Bo-ra | Compositing Artist |
| Visual Effects | Takeshi Miyagawa | Compositing Artist |
| Visual Effects | Haruhide Ishiguro | Compositing Artist |
| Visual Effects | Yusuke Sasano | Compositing Artist |
| Visual Effects | Yang Xiaomu | Compositing Artist |
| Visual Effects | Yoshiaki Kayaba | Compositing Artist |
| Visual Effects | Kazuma Hatakeyama | Compositing Artist |
| Visual Effects | Atsuko Okui | Compositing Artist |
| Visual Effects | Kaneko Fujimaki | Compositing Artist |
| Visual Effects | Kazuma Shinzato | Compositing Artist |
| Art | Hiroyuki Hasegawa | Background Designer |
| Art | Nanae Soji | Background Designer |
| Art | Mie Kasai | Background Designer |
| Visual Effects | Yuichiroh Tozawa | Compositing Artist |
| Camera | Hitoshi Tamura | Director of Photography |
| Visual Effects | Shinnosuke Inaba | Compositing Artist |
| Visual Effects | Tetsuji Sakamaki | Compositing Artist |
| Visual Effects | Kento Kimura | Compositing Artist |
| Visual Effects | Takaya Takahashi | Compositing Artist |
| Camera | Tetsuya Kawata | Director of Photography |
| Visual Effects | Ryoko Takashimizu | Compositing Artist |
| Visual Effects | Kanae Ouchi | Compositing Artist |
| Art | Masaru Sotoya | Background Designer |
| Visual Effects | Kohei Tanada | Compositing Artist |
| Art | Tomomi Masaki | Background Designer |
| Art | Saka Ikeda | Prop Designer |
| Visual Effects | Zhang Zhicheng | Key Animation |
| Visual Effects | Takuo Tominaga | Key Animation |
| Visual Effects | Tatsuo Yamada | Creature Design |
| Visual Effects | Yuuta Nakamura | Compositing Artist |
| Crew | Toshio Hasegawa | Special Effects |
| Art | Sato Takahara | Background Designer |
| Visual Effects | Masakazu Kawazoe | Key Animation |
| Editing | Kazuhiko Seki | Editor |
| Editing | Yuki Honda | Online Editor |
| Art | Marie Murata | Background Designer |
| Art | Yuki Nomura | Background Designer |
| Directing | Hideki Ito | Second Unit Director |
| Art | Kyoko Shibuya | Background Designer |
| Art | Mizuka Ueda | Background Designer |
| Art | Ayumi Takasaki | Background Designer |
| Visual Effects | Tatsuo Yamada | Key Animation |
| Art | Kaori Masaki | Background Designer |
| Art | Kohei Kobayashi | Background Designer |
| Visual Effects | Isao Shoji | Compositing Artist |
| Visual Effects | Fumito Nanba | Compositing Artist |
| Sound | Ryouji Kameda | Sound Mixer |
| Art | Masayuki Kojima | Storyboard Artist |
| Art | Tomoko Yanagishita | Background Designer |
| Sound | Uru | Theme Song Performance |
| Art | Yayoi Ogashiwa | Background Designer |
| Directing | Tatsuo Yamada | Action Director |
| Art | Takahiro Omori | Storyboard Artist |
| Visual Effects | Yu Nishino | Compositing Artist |
| Art | Mao Miyake | Background Designer |
| Art | Nobuhiro Otsuka | Background Designer |
| Art | Hiroshi Kanno | Background Designer |
| Art | Minami Usui | Background Designer |
| Visual Effects | Takuo Tominaga | Layout Supervisor |
| Visual Effects | Hiromitsu Hagiwara | Character Designer |
| Visual Effects | Norimasa Teramoto | Compositing Artist |
| Sound | Noriko Izumo | Sound Effects |
| Art | Fumie Nuibe | Background Designer |
| Art | Izumi Ozawa | Background Designer |
| Visual Effects | Masakazu Kawazoe | Layout Supervisor |
| Art | Hideki Ito | Storyboard Artist |
| Visual Effects | Eiko Hirayama | Compositing Artist |
| Editing | Tetsuro Tsukada | Online Editor |
| Art | Niki Higaki | Background Designer |
| Art | Eriko Nakamura | Background Designer |
| Visual Effects | Tang Siyu | Compositing Artist |
| Visual Effects | Shinya Kobayashi | Compositing Artist |
| Art | Kimiyo Saito | Background Designer |
| Visual Effects | Miyuki Kobayashi | Key Animation |
| Writing | Yuki Midorikawa | Comic Book |
| Directing | Hideki Ito | Director |
| Writing | Sadayuki Murai | Screenplay |
| Art | Yukihiro Shibutani | Art Direction |
| Visual Effects | Akira Takata | Character Designer |
| Crew | Yuki Midorikawa | Creator |
