After swearing off music due to an incident at the middle school regional brass band competition, euphonist Kumiko Oumae enters high school hoping for a fresh start. As fate would have it, she ends up being surrounded by people with an interest in the high school brass band. Kumiko finds the motivation she needs to make music once more with the help of her bandmates, some of whom are new like novice tubist Hazuki Katou; veteran contrabassist Sapphire Kawashima; and band vice president and fellow euphonist Asuka Tanaka. Others are old friends, like Kumiko's childhood friend and hornist-turned-trombonist Shuuichi Tsukamoto, and trumpeter and bandmate from middle school, Reina Kousaka. However, in the band itself, chaos reigns supreme. Despite their intention to qualify for the national band competition, as they currently are, just competing in the local festival will be a challenge—unless the new band advisor Noboru Taki does something about it.
Unfortunately the movie Sound! Euphonium the Movie – Welcome to the Kitauji High School Concert Band is not yet available on HBO Max.
| Art | Hiroyuki Takahashi | Prop Designer |
| Visual Effects | Hiroyuki Takahashi | Animation Director |
| Production | Eharu Ohashi | Producer |
| Production | Shinichi Nakamura | Producer |
| Production | Shigeru Saito | Producer |
| Sound | Shigeru Saito | Music Producer |
| Visual Effects | Shouko Ikeda | Supervising Animation Director |
| Visual Effects | Shouko Ikeda | Animation Director |
| Visual Effects | Shouko Ikeda | Key Animation |
| Directing | Naoko Yamada | Second Unit Director |
| Production | Yoko Hatta | Executive Producer |
| Production | Yoko Kogawa | Executive Producer |
| Production | Shunji Inoue | Executive Producer |
| Production | Yota Tsuruoka | Executive Producer |
| Directing | Tatsuya Ishihara | Second Unit Director |
| Directing | Yoshiji Kigami | Second Unit Director |
| Directing | Noriyuki Kitanohara | Second Unit Director |
| Visual Effects | Noriyuki Kitanohara | Key Animation |
| Directing | Yasuhiro Takemoto | Second Unit Director |
| Visual Effects | Yasuhiro Takemoto | Key Animation |
| Directing | Taichi Ogawa | Second Unit Director |
| Visual Effects | Taichi Ogawa | Key Animation |
| Directing | Haruka Fujita | Second Unit Director |
| Visual Effects | Haruka Fujita | Key Animation |
| Directing | Ai Yukimura | Second Unit Director |
| Directing | Eisaku Kawanami | Second Unit Director |
| Visual Effects | Eisaku Kawanami | Key Animation |
| Directing | Takuya Yamamura | Second Unit Director |
| Visual Effects | Takuya Yamamura | Key Animation |
| Visual Effects | Futoshi Nishiya | Animation Director |
| Visual Effects | Futoshi Nishiya | Key Animation |
| Visual Effects | Chiyoko Ueno | Animation Director |
| Visual Effects | Seiichi Akitake | Animation Director |
| Visual Effects | Seiichi Akitake | Key Animation |
| Visual Effects | Nobuaki Maruki | Animation Director |
| Visual Effects | Rie Sezaki | Animation Director |
| Visual Effects | Kazumi Ikeda | Animation Director |
| Visual Effects | Kazumi Ikeda | Key Animation |
| Visual Effects | Kayo Hikiyama | Animation Director |
| Visual Effects | Kayo Hikiyama | Key Animation |
| Visual Effects | Yoshinori Urata | Key Animation |
| Visual Effects | Kunihiro Hane | Key Animation |
| Visual Effects | Shinpei Sawa | Key Animation |
| Visual Effects | Tomoko Yoshimura | Key Animation |
| Visual Effects | Tatsunari Maruko | Key Animation |
| Visual Effects | Sana Suzuki | Key Animation |
| Visual Effects | Akiko Takase | Key Animation |
| Visual Effects | Yuka Murakami | Key Animation |
| Visual Effects | Tatsuya Satou | Key Animation |
| Visual Effects | Chinatsu Morimoto | Key Animation |
| Visual Effects | Taichi Ishidate | Key Animation |
| Visual Effects | Hiroshi Karata | Key Animation |
| Visual Effects | Nami Iwasaki | Key Animation |
| Visual Effects | Kanae Okura | Key Animation |
| Visual Effects | Yuki Tsunoda | Key Animation |
| Visual Effects | Taira Yamaguchi | Key Animation |
| Visual Effects | Hidehiro Asama | Key Animation |
| Visual Effects | Kohei Okamura | Key Animation |
| Visual Effects | Tomofumi Sugitani | Key Animation |
| Visual Effects | Yuko Myouken | Key Animation |
| Visual Effects | Ayaka Nagahama | Key Animation |
| Visual Effects | Naoya Nakayama | Key Animation |
| Visual Effects | Kota Sato | Key Animation |
| Visual Effects | Ryosuke Shirakawa | Key Animation |
| Visual Effects | Sae Sawada | Key Animation |
| Visual Effects | Ami Kuriki | Key Animation |
| Visual Effects | Ryo Miyaki | Key Animation |
| Visual Effects | Mariko Takahashi | Key Animation |
| Visual Effects | Fumie Okano | Key Animation |
| Visual Effects | Ryouhei Muta | Key Animation |
| Visual Effects | Minoru Ota | Key Animation |
| Visual Effects | Maiko Hado | Key Animation |
| Visual Effects | Tadashi Kashiwagi | Key Animation |
| Visual Effects | Kyohei Ando | Key Animation |
| Visual Effects | Seiya Kumano | Key Animation |
| Visual Effects | Keita Nagahara | Key Animation |
| Visual Effects | Saeko Oofuji | Key Animation |
| Crew | Rina Miura | Special Effects |
| Visual Effects | Joji Unoguchi | 3D Artist |
| Art | Mikiko Watanabe | Background Designer |
| Art | Naoki Hosokawa | Background Designer |
| Art | Shingo Kasai | Background Designer |
| Art | Tomoki Hiraishi | Background Designer |
| Art | Aki Yamatogi | Background Designer |
| Art | Momoka Hase | Background Designer |
| Art | Toru Hasegawa | Background Designer |
| Art | Shouko Ochiai | Background Designer |
| Art | Sayaka Ichiyama | Background Designer |
| Art | Miyuki Hiratoko | Background Designer |
| Art | Ikuko Tamine | Background Designer |
| Art | Nozomi Oishi | Background Designer |
| Art | Yukiko Takeuchi | Background Designer |
| Art | Sagako Itakura | Background Designer |
| Art | Ayami Hidaka | Background Designer |
| Art | Marie Kitai | Background Designer |
| Art | Kouji Maruyama | Background Designer |
| Art | Yoshikatsu Matsumoto | Background Designer |
| Art | Shuuko Uematsu | Background Designer |
| Art | Kazuki Ikeda | Background Designer |
| Art | Etsuko Abe | Background Designer |
| Art | Lee Cheon-bok | Background Designer |
| Art | Lee Mi-jin | Background Designer |
| Art | Kim Ji-hee | Background Designer |
| Art | Sin So-yeon | Background Designer |
| Art | Park Jung-ah | Background Designer |
| Visual Effects | Yoshiko Tanaka | Compositing Artist |
| Art | Yuho Taniuchi | Background Designer |
| Visual Effects | Hiroki Ueda | Compositing Artist |
| Visual Effects | Kohei Funamoto | Compositing Artist |
| Visual Effects | Akihiro Ura | Compositing Artist |
| Visual Effects | Ryuuta Nakagami | 3D Animator |
| Visual Effects | Rin Yamamoto | 3D Animator |
| Visual Effects | Tetsuo Umetsu | 3D Animator |
| Visual Effects | Yuji Shibata | 3D Animator |
| Visual Effects | Norihiro Tomiita | 3D Animator |
| Sound | Eiko Morikawa | Sound Effects |
| Editing | Kengo Shigemura | Editor |
| Art | Yukari Chiba | Background Designer |
| Art | Kaori Anmi | Background Designer |
| Directing | Naoko Yamada | Series Director |
| Art | Tatsuya Ishihara | Storyboard Artist |
| Art | Naoko Yamada | Storyboard Artist |
| Art | Yoshiji Kigami | Storyboard Artist |
| Art | Noriyuki Kitanohara | Storyboard Artist |
| Art | Yasuhiro Takemoto | Storyboard Artist |
| Art | Taichi Ogawa | Storyboard Artist |
| Art | Haruka Fujita | Storyboard Artist |
| Art | Ai Yukimura | Storyboard Artist |
| Art | Eisaku Kawanami | Storyboard Artist |
| Art | Takuya Yamamura | Storyboard Artist |
| Sound | Yasushi Nagura | Sound Recordist |
| Directing | Tatsuya Ishihara | Director |
| Sound | Yota Tsuruoka | Sound Director |
| Art | Mutsuo Shinohara | Art Direction |
| Camera | Kazuya Takao | Director of Photography |
| Writing | Ayano Takeda | Novel |
| Sound | Akito Matsuda | Original Music Composer |
| Writing | Jukki Hanada | Screenplay |
| Visual Effects | Akiyo Takeda | Color Designer |
| Visual Effects | Shouko Ikeda | Character Designer |
| Sound | Masahiro Owada | Music Supervisor |
