That is a good context to have. When I saw the title, I thought they discovered signs of Japanese settlement, similar to the Vikings settlements on the opposite side of the continent.
That was a separate news story from a couple weeks ago. "Late Upper Paleolithic occupation at Cooper’s Ferry, Idaho, USA, ~16,000 years ago" "The stemmed projectile points closely resemble those found in Upper Paleolithic Japan, also supporting the hypothesis of a coastal route."
https://science.sciencemag.org/content/365/6456/891