Built after Kutsukawa Kurumazuka, this is the last large keyhole mound in the Kutsukawa group and is interpreted as the tomb of the next regional paramount chief.
Finds & research
A clay burial facility was identified in the rear mound, and cylindrical and figurative haniwa lined the mound. Details of the grave assemblage are limited.
Two views on the occupant
Archaeological view
A two-tiered keyhole mound at Hirakawa Chayaura, Joyo, 114m long and 161m including its moat. Built in the mid-5th century, it has stone facing, haniwa rows, and a moat; a clay burial facility was identified in the rear mound.
Imperial Household Agency view
This is not an IHA mausoleum. It became a Joyo City Historic Site in 1987 and a component of the National Historic Site Kutsukawa Kofun Group on 3 October 2016.
Field notes
The mound is private property and cannot be entered; view it from surrounding roads.