One of southern Yamashiro’s largest keyhole mounds and the core of the Kutsukawa group. A chest-shaped sarcophagus was found in the rear mound, and the tomb is interpreted as that of a regional paramount chief.
Finds & research
The chest-shaped sarcophagus yielded seven bronze mirrors, armor, beads, and other objects. Numerous haniwa once lined the mound.
Two views on the occupant
Archaeological view
A three-tiered keyhole mound at Hirakawa Kurumazuka, Joyo, about 175m long and 272m including its double moat. Built in the early 5th century, it has stone facing and haniwa rows.
Imperial Household Agency view
This is not an IHA mausoleum. Designated a National Historic Site in 1979, it became a component of the expanded and renamed Kutsukawa Kofun Group in 2016.
Field notes
As investigation for site development continues, follow current Joyo City guidance and on-site visitor routes.