| Location | Sakai, Osaka |
|---|---|
| Shape | Keyhole-shaped mound |
| Mound length | 155 m |
| Period | Late 4th–early 5th c. |
A 155m keyhole mound at the southwestern edge of the Mozu group, dated to the late 4th–early 5th century. Three-tiered construction with moat, stone covering, and haniwa rows. Located approximately 2km southwest of Daisen Kofun, occupying a geopolitically important position on the southwestern edge of the Mozu plateau. One of the few non-World-Heritage Mozu kofun preserved amid Sakai City's urbanisation; protected by Sakai City Board of Education. The name "Chikuoka" may refer to a hill symbolising fertility and vitality.
Excavation records are limited. Surface-collected haniwa and pottery fragments have been reported, but burial chamber details are unconfirmed.
Protected as a Sakai City designated historic site; viewable from the perimeter. About 20–25 min walk from Nankai Main Line "Suwamorimori" or "Hamadera-koen" station.