A large keyhole mound in northern Kawachi. Hirakata City dates it to the late 4th century, an Osaka Prefecture river-improvement plan reference document to the early 5th, and the Agency for Cultural Affairs describes it as Middle Kofun; its precise date remains disputed. The burial facility and grave goods are unknown.
Finds & research
Excavations identified cylindrical haniwa and stone facing. The burial facility and grave goods are unknown.
Official status & archaeological view
Official status
It was designated a National Historic Site on 8 March 1922, with additional areas designated on 19 February 1980 (Hirakata City describes them as the southern and western outer embankments; the Agency for Cultural Affairs as the southern part of the moat and the outer moat on the west side of the mound).
Archaeological view
A 107.5m-long keyhole mound on a terrace above the left bank of the Hotani River, oriented roughly east–west with a surrounding moat and western and southern outer embankments. Hirakata City gives a rear-circle diameter of 58m and a front width of 45m; the Agency for Cultural Affairs gives 54.5m and 44m.
Field notes
The exterior can be viewed from the surrounding parkland. Follow on-site guidance and do not damage the mound or remains.