Special Week.

About Special Week

The Japanese multimedia franchise Umamusume: Pretty Derby, created by Cygames, centers around the titular Umamusume , kemonomimi who replace horses in the series' fictional universe and compete in organized races as both racers and idols. The vast majority of Umamusume featured in the franchise are named after Japanese racehorses, with their names, designs, and characterization inspired by their real-life equivalents' careers and personalities. As of September 2026, there are 135 playable Umamusume in the Umamusume Pretty Derby mobile game, many of whom also appear in the anime and manga series, alongside numerous additional Umamusume and human characters who appear throughout the franchise.