Both groups of people have lived in the Ryukyu Islands, so they may have shared a close relationship, both from interacting with one another.
There is still, however, no evidence that links the Pinza-Abu cave man as the ancestor of people living on Miyako Island today.
[5] Along with human remains, the mammalian fauna found in soil deposits of the site, which may reveal more about the diet of the Pinza-Abu Cave Man.
The dating technique used to determine the timeline from measuring the fluorine content of bones through an ion-selective electrode.
[3] The Pinza-Abu Cave Man was also discovered with stone tools, so they are thought to have already been adept with those skills.
This leads some researchers to believe that the Pinza-Abu people lived primarily in small, familial groups.