The Nakayama Daishogai (中山大障害) is a Group 1 steeplechase horse race in Japan open to thoroughbreds which are three-years-old or above. It is run over a distance of 4100m at Nakayama Racecourse every year in late December. It is one of Japan's two Group 1 jump races of the year, the other being the Nakayama Grand Jump.

A steeplechase is a distance horse race in which competitors are required to jump diverse fence and ditch obstacles. Steeplechasing is primarily conducted in Ireland, Great Britain, Canada, United States, Australia, and France. The name is derived from early races in which orientation of the course was by reference to a church steeple, jumping fences and ditches and generally traversing the many intervening obstacles in the countryside.