A large round mound in Koryo Town. A 2016 report by Koryo Town's museum planning committee names it, with Suyama Kofun, as a representative mound of the Umami Kofun Group.
Finds & research
Horizontal stone chamber (17.1m); horse gear, silver-fitted sword, arrowheads, glass beads and Sue ware.
Official status & archaeological view
Official status
National Historic Site (1957).
Archaeological view
A large three-tiered round mound about 60m along its long axis, built near the end of the late Kofun period. Its horizontal stone chamber is 17.1m long, with a burial chamber 4.5m high. Finds include horse trappings (gyoyo pendants, cheekpieces and cup-shaped stirrups), a silver-fitted sword, arrowheads, glass beads and Sue ware. Koryo Town considers it likely to be the Narai Tomb of Prince Oshisaka-Hikohito, father of Emperor Jomei.
Field notes
Chamber visits require booking with Koryo Town two weeks ahead (no lighting; bring a flashlight). There is a special opening in autumn (check Koryo Town's announcements for dates). The surroundings are a historic park.