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.
| Production | Yoko Kogawa | Executive Producer |
| Production | Shunji Inoue | Executive Producer |
| Production | Shigeru Saito | Producer |
| Visual Effects | Shouko Ikeda | Animation Director |
| Sound | Shigeru Saito | Music Producer |
| Visual Effects | Hiroyuki Takahashi | Animation Director |
| Production | Yota Tsuruoka | Executive Producer |
| Directing | Noriyuki Kitanohara | Second Unit Director |
| Visual Effects | Taichi Ogawa | Key Animation |
| Visual Effects | Akiko Takase | Key Animation |
| Visual Effects | Yuki Tsunoda | Key Animation |
| Visual Effects | Seiya Kumano | Key Animation |
| Visual Effects | Tetsuo Umetsu | 3D Animator |
| Visual Effects | Shinpei Sawa | Key Animation |
| Visual Effects | Ryouhei Muta | Key Animation |
| Visual Effects | Minoru Ota | Key Animation |
| Art | Aki Yamatogi | Background Designer |
| Art | Sagako Itakura | Background Designer |
| Art | Yuho Taniuchi | Background Designer |
| Visual Effects | Hiroki Ueda | Compositing Artist |
| Visual Effects | Chiyoko Ueno | Animation Director |
| Visual Effects | Yuka Murakami | Key Animation |
| Visual Effects | Taira Yamaguchi | Key Animation |
| Art | Tomoki Hiraishi | Background Designer |
| Visual Effects | Akihiro Ura | Compositing Artist |
| Visual Effects | Yoshinori Urata | Key Animation |
| Visual Effects | Sana Suzuki | Key Animation |
| Visual Effects | Kohei Okamura | Key Animation |
| Art | Hiroyuki Takahashi | Prop Designer |
| Production | Eharu Ohashi | Producer |
| Directing | Tatsuya Ishihara | Second Unit Director |
| Visual Effects | Kayo Hikiyama | Key Animation |
| Visual Effects | Nami Iwasaki | Key Animation |
| Visual Effects | Yuji Shibata | 3D Animator |
| Directing | Naoko Yamada | Series Director |
| Visual Effects | Shouko Ikeda | Key Animation |
| Directing | Naoko Yamada | Second Unit Director |
| Production | Yoko Hatta | Executive Producer |
| Directing | Yasuhiro Takemoto | Second Unit Director |
| Visual Effects | Hidehiro Asama | Key Animation |
| Visual Effects | Yoshiko Tanaka | Compositing Artist |
| Visual Effects | Tomoko Yoshimura | Key Animation |
| Visual Effects | Keita Nagahara | Key Animation |
| Visual Effects | Kanae Okura | Key Animation |
| Visual Effects | Yuko Myouken | Key Animation |
| Visual Effects | Naoya Nakayama | Key Animation |
| Production | Shinichi Nakamura | Producer |
| Directing | Takuya Yamamura | Second Unit Director |
| Visual Effects | Nobuaki Maruki | Animation Director |
| Visual Effects | Tatsuya Satou | Key Animation |
| Visual Effects | Fumie Okano | Key Animation |
| Art | Momoka Hase | Background Designer |
| Art | Sin So-yeon | Background Designer |
| Visual Effects | Kohei Funamoto | Compositing Artist |
| Sound | Eiko Morikawa | Sound Effects |
| Directing | Taichi Ogawa | Second Unit Director |
| Visual Effects | Haruka Fujita | Key Animation |
| Directing | Ai Yukimura | Second Unit Director |
| Visual Effects | Takuya Yamamura | Key Animation |
| Visual Effects | Kazumi Ikeda | Key Animation |
| Visual Effects | Chinatsu Morimoto | Key Animation |
| Visual Effects | Ami Kuriki | Key Animation |
| Visual Effects | Ryo Miyaki | Key Animation |
| Visual Effects | Kyohei Ando | Key Animation |
| Visual Effects | Yasuhiro Takemoto | Key Animation |
| Directing | Haruka Fujita | Second Unit Director |
| Visual Effects | Kazumi Ikeda | Animation Director |
| Visual Effects | Ayaka Nagahama | Key Animation |
| Visual Effects | Ryosuke Shirakawa | Key Animation |
| Visual Effects | Maiko Hado | Key Animation |
| Visual Effects | Joji Unoguchi | 3D Artist |
| Art | Nozomi Oishi | Background Designer |
| Art | Lee Mi-jin | Background Designer |
| Art | Yukari Chiba | Background Designer |
| Directing | Eisaku Kawanami | Second Unit Director |
| Visual Effects | Futoshi Nishiya | Key Animation |
| Visual Effects | Seiichi Akitake | Animation Director |
| Visual Effects | Seiichi Akitake | Key Animation |
| Visual Effects | Kayo Hikiyama | Animation Director |
| Visual Effects | Saeko Oofuji | Key Animation |
| Art | Naoki Hosokawa | Background Designer |
| Art | Ikuko Tamine | Background Designer |
| Art | Etsuko Abe | Background Designer |
| Art | Sayaka Ichiyama | Background Designer |
| Art | Kim Ji-hee | Background Designer |
| Art | Park Jung-ah | Background Designer |
| Visual Effects | Rin Yamamoto | 3D Animator |
| Art | Kaori Anmi | Background Designer |
| Visual Effects | Futoshi Nishiya | Animation Director |
| Visual Effects | Taichi Ishidate | Key Animation |
| Art | Shingo Kasai | Background Designer |
| Art | Shouko Ochiai | Background Designer |
| Art | Marie Kitai | Background Designer |
| Visual Effects | Tatsunari Maruko | Key Animation |
| Visual Effects | Hiroshi Karata | Key Animation |
| Visual Effects | Sae Sawada | Key Animation |
| Visual Effects | Tadashi Kashiwagi | Key Animation |
| Crew | Rina Miura | Special Effects |
| Art | Mikiko Watanabe | Background Designer |
| Art | Kazuki Ikeda | Background Designer |
| Visual Effects | Ryuuta Nakagami | 3D Animator |
| Editing | Kengo Shigemura | Editor |
| Visual Effects | Shouko Ikeda | Supervising Animation Director |
| Directing | Yoshiji Kigami | Second Unit Director |
| Visual Effects | Noriyuki Kitanohara | Key Animation |
| Visual Effects | Eisaku Kawanami | Key Animation |
| Visual Effects | Rie Sezaki | Animation Director |
| Visual Effects | Kunihiro Hane | Key Animation |
| Visual Effects | Tomofumi Sugitani | Key Animation |
| Visual Effects | Kota Sato | Key Animation |
| Visual Effects | Mariko Takahashi | Key Animation |
| Art | Miyuki Hiratoko | Background Designer |
| Art | Ayami Hidaka | Background Designer |
| Art | Kouji Maruyama | Background Designer |
| Art | Toru Hasegawa | Background Designer |
| Art | Yukiko Takeuchi | Background Designer |
| Art | Yoshikatsu Matsumoto | Background Designer |
| Art | Shuuko Uematsu | Background Designer |
| Art | Lee Cheon-bok | Background Designer |
| Visual Effects | Norihiro Tomiita | 3D Animator |
| Art | Haruka Fujita | Storyboard Artist |
| Art | Noriyuki Kitanohara | Storyboard Artist |
| Art | Taichi Ogawa | Storyboard Artist |
| Art | Eisaku Kawanami | Storyboard Artist |
| Art | Takuya Yamamura | Storyboard Artist |
| Art | Yoshiji Kigami | Storyboard Artist |
| Art | Ai Yukimura | Storyboard Artist |
| Art | Yasuhiro Takemoto | Storyboard Artist |
| Art | Tatsuya Ishihara | Storyboard Artist |
| Art | Naoko Yamada | Storyboard Artist |
| Sound | Yasushi Nagura | Sound Recordist |
| Directing | Tatsuya Ishihara | Director |
| Art | Mutsuo Shinohara | Art Direction |
| Sound | Yota Tsuruoka | Sound Director |
| Camera | Kazuya Takao | Director of Photography |
| Writing | Ayano Takeda | Novel |
| Sound | Akito Matsuda | Original Music Composer |
| Visual Effects | Akiyo Takeda | Color Designer |
| Sound | Masahiro Owada | Music Supervisor |
| Visual Effects | Shouko Ikeda | Character Designer |
| Writing | Jukki Hanada | Screenplay |
