| Location | Osaka Pref. |
|---|---|
| Shape | Tumulus cluster |
| Mound length | 80 m |
| Period | 4th–6th c. |
Kofun group in Toyonaka City. Main mound (Oishizuka) over 80m. The place name "Sakurazuka" derives from this kofun group, surviving in modern district names. Toyonaka City designated historic site. The morning-glory haniwa (117cm) from Oishizuka is a prime example of large haniwa. The early (mid-4th c.) construction of a large keyhole mound here is precious evidence of coastal Settsu forces aligned with the Yamato court.
Multiple excavations by Toyonaka City Board of Education. From Oishizuka mound: cylindrical haniwa and morning-glory haniwa (preserved height 117cm, base 44.8cm, max diameter 53.4cm; arranged in sets of three). Stone paving (river pebbles and decorative gravel) confirmed on all tiers. Excavated haniwa exhibited at the Toyonaka Municipal Traditional Performing Arts Hall.
The surrounding area has largely been developed into residential land, but the mounds of Oishizuka and Koishizuka are preserved within the neighbourhood and can be visited on foot from Okacho station (about 5 min walk from Hankyu Takarazuka Line "Okacho" station).