The largest mound in Otokuni, built in the early 5th century. In 1980, about 700 iron weapons were found in a deposit facility in the front. The principal rear burial remains unconfirmed because of a cemetery.
Finds & research
A deposit facility in the front yielded about 700 iron weapons, including 146 long swords, 11 iron swords, 52 daggers, and 472 arrowheads.
Two views on the occupant
Archaeological view
An approximately 128m three-tiered keyhole mound at Shoryuji, Nagaokakyo. Its rear is about 78.6m across and 10.4m high, its front about 78.6m wide and 7.6m high, with a roughly 30m-wide moat. Stone facing and haniwa rows are documented.
Imperial Household Agency view
This is not an IHA mausoleum. Designated a National Historic Site in 1981, it became a component of the Otokuni Kofun Group in 2016. Its finds became Kyoto Prefectural Tangible Cultural Properties in 1999.
Field notes
The site is open as Igenoyama Kofun Park; follow current Nagaokakyo City guidance.