It appeared to have been an important military site for monitoring sea routes while maintaining a close relationship with the Kinai region.

It appears that towards the middle of the mid-Yayoi period, the size of the settlement expanded and the population increased; however, the site came to an abrupt end.

By the late Yayoi period, Funakoshi Village, the successor of the site, was located in a lowland about two kilometers southeast of the ruins, so it can be surmised that political and social changes no longer required living on inconvenient mountaintops.

The large quantity of weapons and the sudden end of the settlement have led to speculation that this was a Yayoi period battle site.

Furthermore, in 2016, the remains of a large pillar-supported building were discovered, raising the possibility that this site was intended to monitor traffic in the Seto Inland Sea.