Dee Majesty (Japanese: ディーマジェスティ, foaled 24 March 2013) is a Japanese Thoroughbred racehorse and sire. As a two-year-old in 2015 he showed some promise by finishing second on his first two starts and then winning a minor race before his season was ended by a leg infection. In 2016 he was one of the best colts of his generation in Japan, winning the Tokinominoru Kinen, Satsuki Sho and St Lite Kinen as well as finishing third in the Tokyo Yushun and fourth in the Kikuka Sho. He was retired from racing after two disappointing efforts in the spring of 2017.