Ainu were not related to Caucasoids. They were described (by more modern Japanese) as hairy, etc., "like Europeans,' but there is no relationship. They are an early group, possibly related to the Early Coastal Migration of the eastern Pacific (i.e., Alaska to Baja). That may make them related to Kennewick Man and some of the other early folks being discussed in this post.
Same with these folks?
"Ainu were not related to Caucasoids. They were described (by more modern Japanese) as hairy, etc., "like Europeans,' but there is no relationship."
Esau Jacob/Israel's brother, was described as 'hairy'.