I’m just gonna speak for East Asian only but, from my experience Japanese girls are the most feminine out of Chinese, Korean and Japanese, with the gap being much bigger between Chinese and Korean/Japanese than between Korean and Japanese. Most Chinese girls I know act like guys and dress like guys.
Korean girls are more similar to Japanese girls, but are more likely to express their minds more. From what I seen, Japanese girls are really passive, don’t express themselves as openly, and try really hard to be “cute”. Fashion wise, they are probably the most unique out of all of them. Compared to Korean girls who are almost all about short skirts and one piece dresses (even in the winter), and Chinese girls who as I mentioned just dress like men (pants + jeans mostly).
Makeup wise in Korean and Japanese culture both, the girls wear makeup because it is a form of manners in their culture. Again Chinese being the exception here, a lot of girls don’t wear makeup because they don’t give a damn.
Uniquely amongst them, Japanese girls seem to have something going on with their teeth… not sure what the ‘crooked teeth’ thing is about, maybe they think it looks cute.
As an apt example let me demonstrate the stereotypes of these three by doing slightly racist exaggerations:
[Guy gives Japanese girlfriend a nice gift]
Japanese girl: Ehhhhhhh?? Kawaii Desu!! Arigatooo! (so cute! thank you!), Let me buy you dinner ^^
[Guy gives Korean girlfriend a nice gift]
Korean girl: Jinjja?? Gomaweo Oppa!! (really? thanks oppa!) – *guy still has to pay for dinner afterwards
[Guy gives Chinese girlfriend a nice gift]
Chinese girl: What? That’s it? Looks too cheap. Get me a better one. – *guy still has to pay for dinner afterwards