I'm somewhat familiar with the dental work of Christy Turner as David Chatters covered some of it in his book, Ancient Encounters. (Kennewick Man.)
Turner also proved that some of the ancient American Indians practiced cannibalism when he found a mummified corpolite (a turd) that contained human protein.
An interesting aside, the Jomon pottery is called 'cord' pottery and 'cord' pottery has been found in some of the Olmec sites in Mexico.
I've not seen and DNA on the Ainu either. However, Kennewick Man was declared to have a 23% (the majority) Ainu 'element' to his DNA. That would imply that there is Ainu DNA somewhere.
900AD paintings of Tocharians from the caves of the Buddhist Monestary at Bezeklik, Turfnan, central Asia. (Offering bags of money)