Jungle Pocket, a.k.a. Pokke, is a Umamusume girl who has been running free in freestyle races, aiming to be the strongest. On a whim, Pokke watches a race in the Twinkle Series. She is shocked by Fuji Kiseki's performance in the race, and decides to challenge for the Twinkle Series herself. Pokke enters "Toresen Academy," where Umamusume girls gather, and under the guidance of trainer Tanabe, who raised Fuji Kiseki, she takes on the "Classic Triple Crown Race," a race she is allowed to attempt only once in her lifetime. What awaited him there were rivals of the same generation who were even more talented than Pokke. Dedicated to her work, Dantsu Flame continues to work hard and honestly. Manhattan Cafe, running after a "friend" that only she can see. And Agnes Tachyon, a mad scientist who seeks beyond the possibilities of Umamusume. These Umamusume girls put their pride, their will, and their souls on the line. The hot and fierce battle opens the door to a new era.
Unfortunately the movie Umamusume: Pretty Derby – Beginning of a New Era is not yet available on HBO Max.
| Visual Effects | Jun Yamazaki | Character Designer |
| Visual Effects | Jun Yamazaki | Supervising Animation Director |
| Writing | Tetsuya Kobari | Series Composition |
| Writing | Tetsuya Kobari | Scenario Writer |
| Directing | Ken Yamamoto | Director |
| Writing | Kiyoko Yoshimura | Screenplay |
| Visual Effects | Shuto Yamamoto | Animation Director |
| Directing | Manabu Okamoto | Second Unit First Assistant Director |
| Visual Effects | Ken Yamamoto | Animation Director |
| Directing | Toshimasa Kuroyanagi | Second Unit Director |
| Directing | Liao Chengzhi | Second Unit Director |
| Art | Naoya Nakayama | Storyboard Artist |
| Directing | Naoya Nakayama | Second Unit Director |
| Visual Effects | Miyachi | Animation Director |
| Visual Effects | Ryosuke Ochiai | Animation Director |
| Visual Effects | Ayaka Minoshima | Animation Director |
| Visual Effects | TOMATO | Key Animation |
| Art | Toshimasa Ishii | Storyboard Artist |
| Visual Effects | Yosuke Fukumoto | Animation Director |
| Visual Effects | Naoya Nakayama | Animation Director |
| Directing | Sohei Fuchimoto | Second Unit Director |
| Directing | Ken Yamamoto | Second Unit Director |
| Visual Effects | ump | Key Animation |
| Visual Effects | TOMATO | Animation Director |
| Visual Effects | Masashi Nomura | Animation Director |
| Visual Effects | Sohei Fuchimoto | Animation Director |
| Art | Ken Yamamoto | Storyboard Artist |
| Visual Effects | Yuki Ueda | Animation |
| Visual Effects | Takeshi Maenami | Key Animation |
| Visual Effects | Odashi | Key Animation |
| Visual Effects | rui | Animation |
| Visual Effects | Fukurou P | Key Animation |
| Visual Effects | Sugoroku | Key Animation |
| Visual Effects | Takahiro Watabe | Animation Director |
| Visual Effects | Kerorira | Key Animation |
| Visual Effects | Isuta | Key Animation |
| Visual Effects | shinagiku | Key Animation |
| Visual Effects | Shuu Sugita | Key Animation |
| Visual Effects | Sota Shigetsugu | Key Animation |
| Visual Effects | Mahmoud Moftah | Animation |
| Visual Effects | Nii | Animation |
| Visual Effects | Miyachi | Key Animation |
| Visual Effects | Aya Kondo | Key Animation |
| Visual Effects | saitou | Key Animation |
| Visual Effects | Shian | Key Animation |
| Visual Effects | Tenohira | Key Animation |
| Visual Effects | miton | Key Animation |
| Visual Effects | saucelot | Key Animation |
| Visual Effects | Solal Girardin | Key Animation |
