Grass Wonder, the celebrated Japanese racehorse and popular Umamusume: Pretty Derby character, has died at the age of 30. The iconic thoroughbred passed away on August 8, 2025, marking the end of an era for Japanese horse racing. His death was confirmed through an official statement from Big Red Farm, which revealed that the champion died from multiple organ failure attributed to his advanced age.
The loss of this legendary stallion represents more than just the passing of a racehorse—it signifies the final chapter of what racing enthusiasts call Japan’s “Golden Generation” of 1995. He was the last of the 1995 Golden Generation still alive prior to August 08, 2025, where his death marked the end of it.
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Racing Career That Defined a Generation
Grass Wonder’s racing career was nothing short of spectacular. The champion emerged as an undefeated phenomenon from his debut, quickly establishing himself as a dominant force in late 1990s Japanese racing. His signature victory came in the Asahi Hai Futurity Stakes, which he won in record-breaking time, showcasing the speed and determination that would define his career.
What truly set the grass wonder horse apart was his unprecedented achievement of claiming three consecutive Grand Prix titles. This remarkable feat cemented his position among the greatest racehorses in Japanese history and earned him a devoted following that extended far beyond traditional racing circles.
Key Points Summary
🏆 Racing Achievements:
- Maintained undefeated record from debut
- Won Asahi Hai Futurity Stakes in record time
- Claimed three consecutive Grand Prix titles
- Became face of Japan’s 1995 Golden Generation
🐎 Legacy Impact:
- Sired multiple G1 winners including Screen Hero
- Screen Hero’s offspring includes champion stallion Maurice
- Inspired popular Umamusume: Pretty Derby character
- Last surviving member of legendary 1995 racing class
Breeding Success and Lasting Impact
Beyond his racing accomplishments, Grass Wonder proved equally successful as a breeding stallion. His genetic legacy runs deep through Japanese thoroughbred bloodlines, having sired multiple Grade 1 winners. Most notably, his son Screen Hero became a champion in his own right and went on to sire Maurice, who achieved international acclaim as a champion stallion.
This breeding success ensured that Grass Wonder’s influence on Japanese racing extended well beyond his own competitive years, with his descendants continuing to compete at the highest levels of the sport.
Cultural Icon Through Umamusume
The grass wonder horse gained a new generation of fans through his representation in the popular mobile game Umamusume: Pretty Derby. In the game, he appears as a graceful, soft-spoken character who mirrors the real champion’s racing style and personality. Players particularly appreciate the virtual Grass Wonder’s specialization as a medium to long-distance runner with exceptional finishing speed.
“[Grass Wonder] turned 30 this year and was in good health, but his condition worsened yesterday evening and he passed away this evening. He has taken his last breath,” said Big Red Farm.
Final Days and Peaceful Passing
According to official statements, Grass Wonder had been in remarkably good health for his age right up until his final days. The champion turned 30 earlier this year and showed few signs of the health issues that would ultimately claim his life. His condition deteriorated rapidly on the evening of August 7, and he passed away peacefully the following day.
The announcement from Big Red Farm concluded with heartfelt recognition of the champion’s contributions: “We would like to express our heartfelt condolences to this great horse who made such a great contribution to Japanese horse racing. We pray for the repose of Grass Wonder’s soul. Rest in peace.”
With Grass Wonder’s passing, an entire era of Japanese horse racing comes to a close. His legacy lives on through his descendants, his cultural impact through gaming, and the memories of spectacular performances that thrilled racing fans throughout the late 1990s. The racing world has lost not just a champion, but a true icon whose influence shaped the sport for decades.
What are your favorite memories of watching legendary racehorses compete? Share your thoughts about this racing icon’s incredible legacy in the comments below.