A National Historic Site with tiering comparable to Hashihaka Kofun. According to Muko City's current account, the burial facility is unknown.
Finds & research
A haniwa coffin was found at the western edge, but because no haniwa installation is known on the mound, it may have been brought from elsewhere later. Grave goods from the principal burial are unknown.
Two views on the occupant
Archaeological view
An approximately 91m keyhole mound on Harikoyama in Terado-cho, Muko. One of the earliest mounds, dating to the late 3rd century, it has a three-tiered rear, two-tiered bat-shaped front, and stone facing throughout. Its principal burial facility is unknown.
Imperial Household Agency view
This is not an IHA mausoleum. It was designated a component of the National Historic Site Otokuni Kofun Group on 1 March 2016.
Field notes
Harikoyama, where the mound stands, is closed to entry. Follow on-site signs and Muko City guidance when viewing from outside.