Uma Musume Pretty Derby: Beginning of a New Era (movie)

The film's storyline is based on the career of racehorse Jungle Pocket (1998-2021), who won five of his 13 races from 2000 to 2002, as well as the Japanese Horse of the Year award in 2001.

The real Jungle Pocket was named after a children's song. The green and yellow colors of the racing silk worn by the jockeys during the horse's ownership by Yomoji Saito are referenced on the uma musume's racing costume.

Agnes Tachyon's racing costume features a yellow sweater and green test tubes; both of which reference the colors of the racing silk worn by jockey Hiroshi Kawachi, that raced with the real racehorse (1998-2009), who was undefeated in four races from 2000 to 2001. A bowed tendon after the 2001 Satsuki Sho ended his career and robbed him of his chance at the Classic Triple Crown. Despite having his racing career cut short, Agnes Tachyon was a successful stud horse, with his progeny including Daiwa Scarlet (foaled May 13, 2004).

Aoi Kiryuin and Riko Kashimoto, along with their respective trainees Happy Meek, Little Cocon, and Bitter Glasse from the Umamusume: Pretty Derby video game, make a cameo appearance among the crowd watching the Hopeful Stakes.

In real life, both Jungle Pocket and Fuji Kiseki shared the same owner, trainer, and jockey.

Trainer Tanabe is based on Sadao Watanabe, who trained both Jungle Pocket and Fuji Kiseki in real life.

In real life, Agnes Tachyon, Manhattan Cafe (1998-2015), and Fuji Kiseki were siblings through their sire (father) Sunday Silence (1986-2002).

The Uma Musume Pretty Derby logo for this film features a silhouette of Jungle Pocket.

Factual Error: The Hopeful Stakes race at the Hanshin Racecourse in the beginning of the film is based on the 2000 Radio Tampa Hai Sansai Stakes, which was a G3 race. In real life, the race changed its name to Hopeful Stakes in 2014 when it moved to Nakayama Racecourse in exchange for the Asahi Hai Futurity Stakes. The Hopeful Stakes was not promoted to G1 level until 2017. Unlike in the film, this was not Jungle Pocket's G1 debut; in real life, the racehorse's G1 debut was at the 2001 Satsuki Sho.

Manhattan Cafe's yellow and black necktie references the racing silk worn by the jockeys that raced with the real racehorse, who won six out of 12 races from 2001 to 2002.

Fuji Kiseki's racing costume features yellow and green stripes that reference the racing silk worn by the jockeys that raced with the real racehorse (1992-2015), who was undefeated in four races from 1994 to 1995 before a tendon injury ended his career. Despite having a short racing career, Fuji Kiseki became a successful stud horse, with his progeny including Blast Onepiece (foaled April 2, 2015).