The latest debate on the “first” Americans strongly supports a Pacific coastal route of migration. Key evidence includes the Monte Verde site in Chile (marine algae use) and the White Sands footprints (dated to 22,000 years ago).
Genetic findings show an affinity between South American “Population-Y” and Australasian Indigenous DNA, a component absent in North America. This, coupled with the closed inland ice-free corridor at that time, negates the traditional North American-related Siberian lineage model.
It is highly probable that the pioneers were the Hokkaido Sojin, who followed a maritime-skilled coastal route via the Hokkaido-Kuril Islands and Glacial Beringia, representing an earlier dispersal. This was subsequently followed by the later broad dispersal of the inland-adapted Tianyuan/ANA lineage.
―RSoJS #Sojin