三冠赛, or the "Triple Crown," refers to a series of three prestigious horse races held annually in various countries. In the context of horse racing, it typically includes the Kentucky Derby, Preakness Stakes, and Belmont Stakes in the United States. Winning all three races is a significant achievement and is celebrated in the racing community. In other countries, such as Japan, the term may refer to a different set of races, including the Tokyo Yushun (Japanese Derby), Satsuki Sho (Japanese 2000 Guineas), and Kikka Sho (Japanese St. Leger). The Triple Crown symbolizes excellence in thoroughbred racing and showcases the best horses and jockeys.