The Ōyu Stone Circles is believed to be the tomb of the Jomon people, but there’s no evidence to confirm it. However, since there are similar findings and structures here at the Ippongi Ushiro stone arrangements, it is assumed to be so.

But is it just a grave, or something more? Some say that it was a theater for rituals because it’s such a large space and there were various artifacts and building remains found. What kind of scene do you imagine took place here?

※ Ippongi Ushiro stone arrangements are located northeast of this location but are currently off-limits.