Japanese makeup is the highest quality with natural ingredients...

Loved your article. One other reason that the Japanese mostly have perfect skin is because their makeup brands are highly developed using very high quality ingredients that don't harm your skin.
It's a very Zen-like approach to makeup and skincare, where it's not just about covering up, but rooting out the skin-damaging factors like environment and natural aging. This approach give Japanese makeup manufacturers a definite advantage over their western counterparts.
Oh, and, of course DNA plays an important role too.