A keyhole mound in the south-western part of the Furuichi group. It is 115m long, with a 63m rear circle and a 128m-wide front section—about twice the rear-circle diameter. Terrain constrained the moat; an embankment near the front regulated its water level, and a projection lies north of the constriction. A second moat was confirmed in a fiscal 2003 survey. The Imperial Household Agency administers it as Emperor Seinei's Kochi no Sakado no Hara mausoleum.
Finds & research
The burial facility is unconfirmed. A fiscal 2003 survey outside the known moat identified a second moat and recovered haniwa that date the mound to around the first half of the 6th century.
Two views on the occupant
Archaeological view
The actual occupant and burial facility have not been confirmed. A second, outer moat was identified in a fiscal 2003 survey, and the excavated haniwa date construction to around the first half of the 6th century.
Imperial Household Agency view
Managed by the IHA as the mausoleum of Emperor Seinei (22nd Emperor). Formally named Kochi-no-Sakado-no-Hara-no-Misasagi. Emperor Seinei is said to have died without issue, and he holds an important place in early history as the ruler under whom a succession crisis in the royal line came to the surface. The IHA manages access, and general entry to the mound is prohibited.[IHA Visiting Info] Address: 6-chome Nishiura, Habikino, Osaka / Access: about 18 min walk from Kintetsu Furuichi Station / Hours: 8:30–17:00 in principle (open year-round). Stamp: Furuichi Imperial Mausolea Office.
Field notes
Together with the adjacent Takayatsukiyama Kofun, it preserves the southern end of the Furuichi landscape.