Mukohakayama Kofun is a square mounded tomb constructed on the east side of the round rear part of Hakayama Kofun . It was designed so that a part of the mound penetrates into Hakayama Kofun’s outer bank, and this tomb is considered to be closely related to Hakayama Kofun as a satellite tomb.
The mound length measures 68 m, and its height is 10.7 m.
Both cylindrical haniwa and representational haniwa have been excavated.
The construction period dates to the first half of the 5th century.