| Location | Habikino / Fujiidera, Osaka |
|---|---|
| Shape | Keyhole-shaped mound |
| Mound length | 110 m |
| Period | Early 5th c. |
| World Heritage | Mozu-Furuichi Kofun Group (UNESCO) |
A 110m national historic site directly adjacent to Furumuroyama Kofun (150m). An early-5th-century keyhole mound with three-tiered construction, stone covering, and haniwa—nearly identical in form to its neighbor. Together with Furumuroyama, it documents the early phase of mound construction in the northern Furuichi group. Not IHA-managed; administered by Fujiidera City. The "twin mound" relationship between these two adjacent keyhole mounds suggests a shared funerary zone for a single chieftain lineage across multiple generations.Constituent monument of the "Mozu-Furuichi Kofun Group" UNESCO WHS (2019). "Otori" (Large Bird) may also connect to the ancient place name "Otori Road," the old route linking Naniwa (Osaka) with Yamato (Nara). Furumuroyama and Otoritsuka stand within tens of meters of each other, forming one of the most densely clustered areas in the Furuichi group. Both are protected as national historic sites; a perimeter path allows visitors to view both mounds in a single walk.
Habikino City surveys confirmed fukiishi, cylindrical haniwa, and figural haniwa. A vertical-shaft stone chamber in the rear circle is presumed. The occupant is unknown.