I always thought that there was a connection between the Ainu and the Inuit. I noticed some similarities in their artwork long ago.
The Smithsonian a couple of years back had some Ainu/Jomon pottery on display ~ several pieces had been made to look like people ~ remarkably like people I know. A recent National Geographic featured some native people in Greenland who also looked like that pottery.
There are other Polar People who arise out of various other groups, but they all share a similar culture ~ and technology (until modern times). The art gene is strong in all of them.