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.
Official status & archaeological view
Official status
It was designated a component of the National Historic Site Otokuni Kofun Group on 1 March 2016.
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 and a two-tiered front that flares in a plectrum-like (bachi) shape, with stone facing throughout.
Field notes
Harikoyama, where the mound stands, is closed to entry. Follow on-site signs and Muko City guidance when viewing from outside.