Ainu have a lot pf blue eyes but not nearly as many as North Europeans
That's the first I've ever heard of that.
"The Ainu look like Caucasian people, they have white skin, their hair is wavy and thick, their heads are mesocephalic (round) and a few have grey or blue eyes. However, their blood types are more like the Mongolian people, possibly through many millennia of intermixing."