| Location | Sakai, Osaka |
|---|---|
| Shape | Keyhole-shaped mound |
| Mound length | 168 m |
| Period | Late 4th–early 5th c. |
A 168m keyhole mound that was once 5th largest in the Mozu group. Destroyed by 1985.
Emergency salvage excavation by Sakai City in 1985, conducted as the mound was being destroyed by unauthorized sand quarrying. Eight clay-lined burial pits (four in rear section, four in front section) were confirmed. Recovered: 5 bronze mirrors, beads, combs, over 200 swords and bladed weapons, over 1,500 iron arrowheads, 7 complete armor sets, and 32 hand axes — an exceptionally rich assemblage for a single Mozu group excavation. Records and finds are preserved and partly exhibited at the Sakai City Museum; the site itself is now residential with no surviving physical evidence.
Though the mound itself is gone, the curves of the residential streets that replaced it still trace the original outline of the keyhole mound. The gentle arcs of the roads quietly preserve the memory of the ancient tomb beneath the modern neighbourhood.