The Ishibutai-kofun lies in Shimasho, Asuka Village. Nara Prefecture.
Records show that Soga no Umako resided in this neighborhood and it is believed to be Umako’s own tomb.
Soga no Umako is the son of Soga no Iname and the strongest member of the Soga clan.
It is the largest square-shaped burial mound in Japan.
The name "Ishibutai"(Stone Stage) is derived from its shape.
It is made up of more than 30 stones that weigh a total of about 2,300 tons.