Hokkaido settled by Japanese in mid-1800s. Today they have a different character than Honshu #SelectionEffect
http://www.bbc.com/future/story/20170118-how-east-and-west-think-in-profoundly-different-ways …pic.twitter.com/rEoEcEi0ax
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Very little genetic differences between Japanese groups. Look at the Fst values! http://www.sciencedirect.com/science/article/pii/S0002929708004874 … @RCAFDM @whyvert
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