Shinzan (シンザン; 2 April 1961 – 13 July 1996) was a thoroughbred racehorse that won the Japanese Triple Crown.

His dam, Hayanobori was a great-granddaughter of the Irish mare Beautiful Dreamer who was imported to Japan in the 1930s and became extremely influential: her other descendants included the Japanese classic winners Kazuyoshi, Jitsu Homare, Hakuryo and Meiji Hikari.

Shinzan was generally considered to be the best Japanese racehorse of the post-war era and became the first horse to win all 5 big titles of Japan including the Japanese Triple Crown.

Eventually, he could not stand by himself at times, and his physical weakening became more prominent after February, 1994.

He is (to date) the longest-lived thoroughbred horse ever recorded in Japan.