Real Shadai (1979–2004) was an American-born Thoroughbred racehorse who raced in France and became a leading sire in Japan.

Real Shadai was bred by Franklin Groves' North Ridge Farm near Lexington, Kentucky, and sold at the 1980 Keeneland July yearling sale for $360,000 to the renowned Japanese horseman Zenya Yoshida.

As he had done before with his Champion colt Northern Taste, Yoshida turned Real Shadai over to trainer John Cunnington, Jr. at the Great Stables in Chantilly.

His other significant outing was a second-place finish in the 1982 GI Prix du Jockey Club to Robert Sangster's colt Assert.

Pensioned in 2000, Real Shadai became afflicted with hyposthenia, brought on by laminitis, and died at the age of twenty-five on May 26, 2004.