| Location | Habikino / Fujiidera, Osaka |
|---|---|
| Shape | Keyhole-shaped mound |
| Mound length | 225 m |
| Period | Early 5th c. |
| World Heritage | Mozu-Furuichi Kofun Group (UNESCO) |
A large keyhole mound (225m, 5th in Furuichi, 23rd nationally). Dated to the early 5th century; designated by the IHA as a satellite of Konda Gobyoyama (Emperor Ojin mausoleum, 425m), but many researchers argue its immense scale qualifies it as an independent royal tomb. Double moats; excavations (1956–57) recovered wooden coffins, armor, mirrors, and jewels from a burial of the highest elite class. Often described as the "other great mound" of the Furuichi group, paralleling Daisen Kofun's relationship to the Mozu group.Constituent monument of the "Mozu-Furuichi Kofun Group" UNESCO WHS (2019). The name "Hakayama" literally means "Tomb Hill"—a strikingly direct place name that has reflected recognition of this site as a major burial place since antiquity. Despite its satellite designation, the overwhelming 225m scale suggests this may not be a simple accessory mound but an independent tomb of a powerful figure—a view held by many archaeologists. The IHA designation is based on Meiji-period historical geography research predating modern archaeological dating, making this one of the more contested attributions. The richness of its grave goods places it alongside Minegatsuka Kofun (3,500+ artifacts) as one of the most artifact-rich sites in the Furuichi group.
No excavation permitted under IHA mausoleum regulations. Internal structure and grave goods remain unknown. Exterior viewable from public paths.