Emperor Nintoku (仁徳天皇) was the 16th emperor of Japan, according to the traditional order of succession.
No firm dates can be assigned to this emperor's life or reign, but he is conventionally considered to have reigned from 313–399.
Daisen-Kofun (the biggest tomb in Japan) in Sakai, Osaka is considered to be Nintoku's final resting place. The actual site of Nintoku's grave is not known.
The Imperial tomb of Nintoku's consort, Iwa-no hime no Mikoto, is said to be located in Saki-cho, Nara City. Both kofun-type Imperial tombs are characterized by a keyhole-shaped island located within a wide, water-filled moat. Imperial tombs and mausolea are cultural properties; but they are guarded and administered by the Imperial Household Agency (IHA), which is the government department responsible for all matters relating to the emperor and his family. According to the IHA, the tombs are more than a mere repository for historical artifacts; they are sacred religious sites. IHA construes each of the Imperial grave sites as sanctuaries for the spirits of the ancestors of the Imperial House.
Nintoku is traditionally venerated at a memorial Shinto shrine (misasagi) at Osaka. The Imperial Household Agency designates this location as his mausoleum. It is formally named Mozu no Mimihara no naka no misasagi.