01 / Tumulus
In the stone chamber of a round mound,a coffin 2.85 m long.

Maruyama Kofun in Sakurabasama Historic Park is a round tumulus built in the first half of the 6th century. The house-shaped stone coffin in its stone chamber measures 2.85 m long, 1.46 m wide and 1.83 m high. It is made of Aso welded tuff from the Uto Peninsula in Kumamoto Prefecture, known as Makado stone.
- Round tumulus, first half of the 6th century
- Coffin 2.85 m long
- One tumulus of the national historic site Oiwayama Tumulus Group
