| Location | Habikino / Fujiidera, Osaka |
|---|---|
| Shape | Keyhole-shaped mound |
| Mound length | 230 m |
| Period | Late 5th c. |
| World Heritage | Mozu-Furuichi Kofun Group (UNESCO) |
| IHA designation | IHA-managed (no public entry) |
230m long, 20th nationally. A three-tiered keyhole mound with double moats at the northern edge of the Furuichi group. The rear circle is ~20m high and ~130m in diameter. Designated by the IHA as Emperor Ingyo's mausoleum. Together with Konda Gobyoyama (425m), Nakatsuyama (290m), and Oka Misanzai (245m), this mound forms the "Big Four" of the Furuichi group, collectively illustrating the scale of 5th-century royal burial on the Furuichi plateau. Serves well as the northern starting point of walking tours covering the Furuichi group from Fujiidera Station (~2 hours).Constituent monument of the "Mozu-Furuichi Kofun Group" UNESCO WHS (2019). The name "Ichinoyama" may mean "Market Hill" or "First Hill," suggesting its recognition as a landmark on the Furuichi plateau since ancient times. Emperor Ingyo is described in the chronicles as reigning from the Anahe palace and codifying the kabane system to organize lineage hierarchies among the royal house and clans. While the specific attribution cannot be confirmed archaeologically, the late-5th-century date is consistent with the chronicle's placement of Emperor Ingyo, lending some credibility to the IHA designation.
No excavation permitted under IHA mausoleum regulations. Internal structure and grave goods remain unknown. Exterior viewable from public paths.