Tsurumaru Tsuyoshi, Racehorse Behind Umamusume Character, Dies at 31

Tsurumaru Tsuyoshi, the retired Japanese racehorse who inspired a fan-favorite character in Cygames' Umamusume: Pretty Derby, died on August 2, 2026, at the age of 31. The horse was found unable to rise from his pasture at Yoshino Farm in Miyazaki, and veterinary treatment proved unsuccessful, leading to euthanasia.

A Career Defined by Brilliance and Fragility

Born on April 6, 1995, Tsurumaru Tsuyoshi was the son of legendary racehorse Symboli Rudolf and belonged to Japan's celebrated "Golden Generation" of horses born that year. Despite a constitution plagued by health problems - including an osteochondroma diagnosis - he compiled an impressive record of five wins from just eleven career starts.

His crowning achievement came at the 1999 Kyoto Daishoten, where he defeated a stacked field that included Special Week, Mejiro Bright, T.M. Opera O, and Stay Gold - all of whom would themselves go on to inspire Umamusume characters. He also captured the 1999 Asahi Challenge Cup, cementing his reputation as a talented but physically fragile competitor.

Tsurumaru Tsuyoshi's racing career ended abruptly when he suffered a ruptured suspensory ligament in his front left leg during the 2000 Arima Kinen, forcing his retirement. He briefly served as a lead horse at Kyoto Racecourse before health complications necessitated his withdrawal from that role as well.

Life After Racing

Following the death of his original owner in 2011, Shigeo Nakanishi established the Tsurumaru Tsuyoshi Association to fund the horse's ongoing care. The organization ensured the aging thoroughbred could live out his remaining years comfortably at Yoshino Farm in Miyazaki Prefecture, where he spent his final days.

Reaching the age of 31 is remarkable for a thoroughbred racehorse. The average lifespan for the breed typically falls between 25 and 28 years, making Tsurumaru Tsuyoshi's longevity a testament to the dedicated care he received throughout his retirement.

Legacy in Umamusume: Pretty Derby

Tsurumaru Tsuyoshi's real-life story of unfulfilled potential made him a natural fit for Cygames' multimedia franchise Umamusume: Pretty Derby, which reimagines famous Japanese racehorses as anthropomorphized characters. His in-game counterpart, voiced by Yoshino Aoyama, is depicted as an upbeat runner with enormous potential whose body struggles to keep up with her determination - a characterization that closely mirrors the real horse's career arc.

The Umamusume official account issued a statement following the news, extending condolences and offering prayers for the racehorse. "We extend our condolences to everyone involved and sincerely pray for the repose of this great racehorse," the account stated. Voice actress Aoyama also paid tribute on social media, as did numerous fans of both the franchise and Japanese horse racing.

A Broader Cultural Impact

Umamusume: Pretty Derby has played a significant role in connecting younger audiences with the history of Japanese horse racing, and Tsurumaru Tsuyoshi's passing is a reminder of the living legacies behind the franchise's characters. The outpouring of tributes from both the racing and gaming communities underscores how deeply the franchise has intertwined these two worlds.

Tsurumaru Tsuyoshi is survived by a legacy that extends far beyond the racetrack - from the Golden Generation that defined an era of Japanese racing to a digital incarnation that continues to introduce his story to new audiences worldwide.