I never heard of Ainu, but from the images posted they appear to be Persian. This is somewhat odd to me since Persians look like the Flemish, which is my heritage. Pictures of Iranian leaders look a lot like pictures in my family album, and that is doubly odd since my family originally emigrated from the moors of England to Massachusetts a long time ago after presumably emigrating from Flanders to England.
What does it mean? Not much except that humans were migrating all over the planet long before written records became common. 13,000 years? Current events to old goats.
An Ainu Man (Related to Kennewick Man)