Japan (foaled 22 February 2016) is a British-bred Irish-trained Thoroughbred racehorse. After being sold as a yearling for 1.3 million guineas he was sent into training with Aidan O'Brien. As a two-year-old in 2018 he showed considerable promise, winning two of his three races including the Group 2 Beresford Stakes. In the following year he improved to become one of the best three-year-olds in Europe, finishing fourth in the Dante Stakes and third in the Epsom Derby before winning the King Edward VII Stakes, the Grand Prix de Paris and the International Stakes. He failed to win in five attempts as a four-year-old in 2020.