Speaking as an older weeb who reads Korean and Chinese works as well, Japan tends to be the most varied of the 3 for male directed stuff. Chinese especially is all ridiculously curvy women with slim waists and tight clothes. For Japan, especially in the case of harems or multiple female leads (stuff like Azumanga etc) they generally have a range, and there is a lot of works aimed at women that doesn't go down the big boob route (though usually has always perfect looking tall men in contrast).

I've seen similar stuff in games too, at least the ones I play. I wish FFXIV had better butt sliders for everyone and every race, but other that than I enjoyed how you can have really subdued chests etc for characters, rather than some of the super hero bodies I saw in other games.

Also, may I also present American superhero comic books. It's less a Japan only thing and more a... male thing I guess? You have good examples in every country I'm sure, but if you're only looking superficially you'll only see the most common stuff, which often are the more generic and problematic on this front.