Nara Prefecture's largest keyhole mound, about 330m long. Kashihara City regards Maruyama, Gojono Maruyama, or Ogaru Maruyama as more appropriate names than Mise Maruyama.
Finds & research
The chamber's exact size is uncertain because of sediment, but its present dimensions are about 28.4m overall, with an 8.3m burial room and 20.1m passage. It contains two house-shaped sarcophagi.
Official status & archaeological view
Official status
Only the upper rear mound, not the entire kofun, is the Imperial Household Agency’s Unebi Mausoleum Reference Site. The broader mound area outside that precinct is included in the National Historic Site Maruyama Kofun.
Attribution (jitei): the Imperial Household Agency's determination of whose tomb it manages — separate from heritage designation.
Archaeological view
A keyhole mound spanning Gojono, Ogaru, and Mise in Kashihara, built in the late 6th century. Including the moat, it extends about 420m. Its presently measurable c.28.4m double-sleeved horizontal stone chamber holds two house-shaped sarcophagi; the entrance-side coffin is considered earlier than the rear one. The occupants are unconfirmed; Kashihara City notes that, judging from the date of the mound and its sarcophagi, Emperor Kinmei and Soga no Iname are among the names proposed.
Field notes
The upper tier of the rear mound is managed by the Imperial Household Agency as a Mausoleum Reference Site, and the rest is a National Historic Site (Kashihara City).