Umamusume: Pretty Derby is a Japanese multimedia franchise created by Cygames. The franchise centers on anthropomorphised racehorses known as Umamusume (ウマ娘; lit. 'horse girls'), who compete in races inspired by real-life race tracks managed by the Japan Racing Association. Most of the characters are named after and modeled on actual racehorses, reflecting their namesakes' personalities, racing records, and relationships with other racehorses. Initially announced in 2016 as a mobile game, the project soon expanded to include multiple anime series, manga, and live concerts.

The game was scheduled to debut in late 2018 for iOS and Android devices, but it was delayed to a February 2021 release, with a Windows client releasing a month later on DMM Games, then later on Google Play Games in April 2023. It would later be available in Korean by Kakao Games and Traditional Chinese by Komoe Game in June 2022, with the former language getting a PC version in a stand-alone client a year later, then later in Simplified Chinese by Bilibili in August 2024. An English-language edition was released worldwide in June 2025 for the aforementioned platforms, alongside a Steam release for both the Japanese and English versions, with the latter language being exclusively available on that platform.

An anime television series adaptation produced by P.A. Works aired from April to June 2018. A second season now produced by Studio Kai, with the former studio assisting in its production, aired from January to March 2021. A third season produced solely by Studio Kai aired from October to December 2023.

Alongside the main anime series, multiple anime spin-offs have been made. An anime television series adaptation of the manga Umayon aired from July to September 2020. Its sequel, titled Umayuru, was released from October 2022 to March 2023. A web anime produced by Cygames' in-house animation studio CygamesPictures titled Umamusume Pretty Derby: Road to the Top was released from April to May 2023. An anime film also produced by CygamesPictures titled Umamusume Pretty Derby: Beginning of a New Era premiered in Japan in May 2024. An anime television series adaptation of Umamusume: Cinderella Gray produced by CygamesPictures premiered in April 2025, with a short spin-off anime titled Umayuru: Pretty Gray being released from April to May 2025.

The franchise has had a significant cultural impact, initially in Japan and later worldwide following the game's global release in 2025.

Umamusume: Pretty Derby is a sports simulation game that allows players, who are referred in-game as "trainers", to raise and train horse-girl characters called Umamusume to compete in races whilst achieving the Umamusume's individual goals. Players collect two types of units through the game's gacha system: playable Umamusume or "trainees," and support cards that provide skills and bonuses.

The main gameplay mode, "Career," lets players choose a scenario, trainee, and support cards, then work to achieve specific goals. The game operates on a calendar system, with each action taking up half a month, requiring strategic planning. The calendar used is based on the real life JRA's race schedule, with the races the trainees can enter being based on their real life equivalents such as the Japan Cup or the Arima Kinen.

Players use turns to raise their trainee's five attributes (speed, stamina, power, guts, and wit), rest to restore energy, or enter races to earn skill points and fans. Additionally, random events can occur during a Career run that may grant additional stats and skills, as well as positively or negatively impact the trainee's mood, which affects training effectiveness and race performance.