Real Shadai (1979–2004) was an American-born Thoroughbred racehorse who raced in France and became a leading sire in Japan. A descendant of Nearco, he was sired by Epsom Derby winner Roberto and out of the U.S. Racing Hall of Fame mare Desert Vixen. In 1981, Real Shadai was a non-winner in his two starts at age two. Out of his six races the following year, he won two, the most important of which was the 1982Grand Prix de Deauville. His other significant outing was a second-place finish in the 1982 GI Prix du Jockey Club to Robert Sangster's colt Assert.