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.
| Production | Noriko Iwasaki | Associate Producer |
| Sound | Makoto Yoshimori | Original Music Composer |
| Visual Effects | Miyuki Ooshiro | Animation Director |
| Visual Effects | Ena Nishikawa | Animation Director |
| Directing | Miyuki Ooshiro | Second Unit Director |
| Visual Effects | Miyuki Ooshiro | Key Animation |
| Directing | Takahiro Omori | Director |
| Visual Effects | Orie Tanaka | Animation Director |
| Visual Effects | Orie Tanaka | Key Animation |
| Visual Effects | Hideyuki Motohashi | Key Animation |
| Visual Effects | Madoka Katto | Key Animation |
| Visual Effects | Tomomi Shimazaki | Key Animation |
| Art | Miyuki Ooshiro | Storyboard Artist |
| Visual Effects | Natsuko Kondou | Animation Director |
| Visual Effects | Rie Maehara | Key Animation |
| Visual Effects | Jun Maeda | Key Animation |
| Visual Effects | Hiroto Yokote | Key Animation |
| Visual Effects | Eri Yamazaki | Key Animation |
| Visual Effects | Michiko Asada | Key Animation |
| Visual Effects | Masami Gouda | Key Animation |
| Visual Effects | Kenji Hayama | Key Animation |
| Visual Effects | Mayumi Nakamura | Key Animation |
| Visual Effects | Hiroshi Tomioka | Key Animation |
| Visual Effects | Masahisa Koyata | Key Animation |
| Visual Effects | Eri Yamazaki | Animation Director |
| Visual Effects | Terumi Muto | Key Animation |
| Visual Effects | Miyako Kano | Key Animation |
| Visual Effects | Toshinari Yamashita | Key Animation |
| Visual Effects | Yoriko Goto | Key Animation |
| Visual Effects | Yang Peng | Key Animation |
| Visual Effects | Emi Nakamura | Key Animation |
| Visual Effects | Fumiyo Kimura | Key Animation |
| Visual Effects | Toshie Kawamura | Key Animation |
| Visual Effects | Emi Ikebuchi | Key Animation |
| Visual Effects | Shinsuke Ishikawa | Key Animation |
| Visual Effects | Eri Nishikawa | Key Animation |
| Visual Effects | Naoko Hayashi | Key Animation |
| Visual Effects | Ryo Tanaka | Key Animation |
| Visual Effects | Maho Takagi | Key Animation |
| Visual Effects | Kayo Daibou | Key Animation |
| Visual Effects | Masahiro Koyama | Key Animation |
| Visual Effects | Tomoyo Kamoi | Key Animation |
| Visual Effects | Tomomi Ishii | Key Animation |
| Visual Effects | Mamie Ashikaga | Key Animation |
| Visual Effects | Kenji Hayama | Animation Director |
| Visual Effects | Megumi Miyagawa | Key Animation |
| Visual Effects | Miki Urashima | Key Animation |
| Visual Effects | Misao Abe | Key Animation |
| Visual Effects | Atsushi Aono | Key Animation |
| Visual Effects | Wataru Abe | Key Animation |
| Visual Effects | Kazune Suzuki | Key Animation |
| Visual Effects | Yasuhiro Saiki | Key Animation |
| Visual Effects | Shintaro Doge | Key Animation |
| Sound | Masafumi Watanabe | Foley Artist |
| Visual Effects | Haruhide Ishiguro | Compositing Artist |
| Visual Effects | Kazuma Hatakeyama | Compositing Artist |
| Visual Effects | Kanae Ouchi | Compositing Artist |
| Visual Effects | Atsuko Okui | Compositing Artist |
| Visual Effects | Kaneko Fujimaki | Compositing Artist |
| Visual Effects | Isao Shoji | Compositing Artist |
| Visual Effects | Kim Bo-ra | Compositing Artist |
| Visual Effects | Kohei Tanada | Compositing Artist |
| Visual Effects | Masakazu Kawazoe | Key Animation |
| Visual Effects | Yuichiroh Tozawa | Compositing Artist |
| Visual Effects | Kento Kimura | Compositing Artist |
| Visual Effects | Ryoko Takashimizu | Compositing Artist |
| Visual Effects | Norimasa Teramoto | Compositing Artist |
| Art | Niki Higaki | Background Designer |
| Art | Kaori Masaki | Background Designer |
| Art | Hiroshi Kanno | Background Designer |
| Art | Minami Usui | Background Designer |
| Visual Effects | Takeshi Miyagawa | Compositing Artist |
| Visual Effects | Fumito Nanba | Compositing Artist |
| Camera | Hitoshi Tamura | Director of Photography |
| Sound | Ryouji Kameda | Sound Mixer |
| Art | Mao Miyake | Background Designer |
| Visual Effects | Tatsuo Yamada | Key Animation |
| Crew | Toshio Hasegawa | Special Effects |
| Art | Tomoko Yanagishita | Background Designer |
| Visual Effects | Hiromitsu Hagiwara | Character Designer |
| Visual Effects | Tatsuo Yamada | Creature Design |
| Visual Effects | Yusuke Sasano | Compositing Artist |
| Visual Effects | Kazuma Shinzato | Compositing Artist |
| Visual Effects | Yang Xiaomu | Compositing Artist |
| Editing | Yuki Honda | Online Editor |
| Art | Marie Murata | Background Designer |
| Art | Kohei Kobayashi | Background Designer |
| Directing | Tatsuo Yamada | Action Director |
| Editing | Kazuhiko Seki | Editor |
| Visual Effects | Tang Siyu | Compositing Artist |
| Visual Effects | Takuo Tominaga | Layout Supervisor |
| Visual Effects | Takuo Tominaga | Key Animation |
| Visual Effects | Eiko Hirayama | Compositing Artist |
| Visual Effects | Yuuta Nakamura | Compositing Artist |
| Visual Effects | Shinya Kobayashi | Compositing Artist |
| Visual Effects | Shinnosuke Inaba | Compositing Artist |
| Art | Kimiyo Saito | Background Designer |
| Visual Effects | Zhang Zhicheng | Key Animation |
| Visual Effects | Shoko Harada | Compositing Artist |
| Art | Mie Kasai | Background Designer |
| Art | Eriko Nakamura | Background Designer |
| Visual Effects | Yoshiaki Kayaba | Compositing Artist |
| Editing | Tetsuro Tsukada | Online Editor |
| Art | Hiroyuki Hasegawa | Background Designer |
| Art | Nanae Soji | Background Designer |
| Art | Hideki Ito | Storyboard Artist |
| Visual Effects | Tetsuji Sakamaki | Compositing Artist |
| Visual Effects | Takaya Takahashi | Compositing Artist |
| Visual Effects | Toshihiro Fujita | Compositing Artist |
| Art | Izumi Ozawa | Background Designer |
| Art | Yuki Nomura | Background Designer |
| Visual Effects | Masakazu Kawazoe | Layout Supervisor |
| Directing | Hideki Ito | Second Unit Director |
| Sound | Noriko Izumo | Sound Effects |
| Art | Fumie Nuibe | Background Designer |
| Art | Kyoko Shibuya | Background Designer |
| Art | Ayumi Takasaki | Background Designer |
| Art | Takahiro Omori | Storyboard Artist |
| Art | Masayuki Kojima | Storyboard Artist |
| Art | Mizuka Ueda | Background Designer |
| Art | Tomomi Masaki | Background Designer |
| Camera | Tetsuya Kawata | Director of Photography |
| Art | Saka Ikeda | Prop Designer |
| Visual Effects | Yu Nishino | Compositing Artist |
| Art | Masaru Sotoya | Background Designer |
| Art | Nobuhiro Otsuka | Background Designer |
| Art | Yayoi Ogashiwa | Background Designer |
| Art | Sato Takahara | Background Designer |
| Sound | Uru | Theme Song Performance |
| 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 |
