Yamatotakada's largest kofun and the Iwasono Mausoleum Reference Site, managed by the Imperial Household Agency.
Finds & research
The Imperial Household Agency holds Haji ware and other material from the Iwasono Mausoleum Reference Site. The central burial facility and full grave assemblage are unknown.
Official status & archaeological view
Official status
The Imperial Household Agency manages it as the Iwasono Mausoleum Reference Site.
Attribution (jitei): the Imperial Household Agency's determination of whose tomb it manages — separate from heritage designation.
Archaeological view
A 210m keyhole mound at Tsukiyama, Yamatotakada. It extends about 261m including the water-filled moat, and the city dates it to around the 5th century. A Koryo Town study instead places it at the end of the Early to the beginning of the Middle Kofun period, and the Imperial Household Agency regards miniature pottery from its projection as material for considering funerary ritual in the latter half of the Early Kofun period. As a Mausoleum Reference Site, its central burial facility and occupant remain unverified. Yamatotakada City notes that it is traditionally said to be the tomb of Emperor Buretsu, but that the occupant has still not been identified.