It's really not fair to compare east asian IQ's to "western europe" and "america".
Western Europe and USA are quite mixed. Many of the "whites" are very tainted.
If you wanted to get accurate results, for comparing whites to mongoloids, you'd go to all-white small towns in scandanavia to get the true white average.
What's more, the japs and koreans have a lot of white in them. If you wanted to get the accurate mongoloid scores you'd go to vietnam or indonesia.
Now imagine small town in Norway vs small town in Vietnam. Who do you think will win that one? Very easy answer there. Or even a small town in China vs the Norwegians. The Whites would have the higher score.
If you want to be multi-culti and mixy you'd compare americans to mongolians. That's a "fair" fight
Mongolians are very mixed, and so are Americans.