| Location | Sakai, Osaka |
|---|---|
| Shape | Keyhole-shaped mound |
| Mound length | 100 m |
| Period | Early 5th c. |
| Designation | Imperial Satellite Tomb (IHA) |
| World Heritage | Mozu-Furuichi Kofun Group (UNESCO) |
A 100m keyhole mound just outside the outer moat on the north side of Daisen Kofun, 10.3m high at both the rear circle and the front section, laid out — like Daisen itself — along the western edge of the plateau with its front section to the south, and generally read as connected with Daisen. The IHA administers it as a satellite of the Nintoku mausoleum, though the fact that it is a large keyhole mound with a projection has led some to doubt that it is a satellite at all. It appears to have been built in three tiers, ringed by a moat, with a projection on the west of the waist and an earthen causeway across the moat on the east (whether the causeway is original is unclear). The satellite tomb system (baicho) developed around the great royal mounds of the 5th century, and more than a dozen satellite mounds are documented across the Mozu and Furuichi groups combined.Constituent monument of the "Mozu-Furuichi Kofun Group" UNESCO World Heritage Site (2019). Managed separately from the main Daisen Kofun enclosure as a "detached" IHA site. The satellite tomb system (baicho) is attested across ancient East Asia and concentrates around the great Japanese royal mounds of the 5th century. The presence of satellite tombs reflects both the power of the great kings and the ancient belief that close attendants should rest beside their lord in death.
No excavation has been carried out, owing to IHA mausoleum regulations. Internal structure and grave goods remain unknown. Only the exterior can be viewed, from the perimeter and the moat side.