Zenno Rob Roy (ゼンノロブロイ, Zenno Robu Roi) (27 March 2000 – 2 September 2022) was a Japanese Thoroughbred racehorse and active sire. In a racing career which lasted from February 2003 until December 2005, he ran twenty times, winning seven races and being placed on ten further occasions. As a three-year-old in 2003, he won two Group races and finished second in the Tokyo Yushun (Japanese Derby). His greatest success came as a four-year-old in the following year when he was named Japanese Horse of the Year after winning the three all-aged Group One races which comprise Japan's Autumn Triple Crown: the Autumn Tenno Sho, the Japan Cup, and the Arima Kinen. In 2005, he failed to win but was placed in the International Stakes in Britain as well as in the Tenno Sho and Japan Cup. He was then retire