my replies on the youtube comment section:

there's always Cruel Intentions and Wild Things. Catholic or prep school girls in America are equally fantasized about and reenacted in movies and such. American Beauty? The Babysitters? It's more common in Japan IMHO because they have less of a taboo against sexuality overall than Christian-heavy countries, although I also have a problem when children (including Kuriyama from Kill Bill when she was 13) have pornographic photos taken of them and published in those thick manga weeklies.

since this is specifically targetting school uniforms, i think one of the main components is that AFAIK almost all schools in Japan require school uniforms, whereas many in the US or other countries kids are mostly allowed to wear whatever they please. however, all things considering, "western" countries aren't giving a much better perspective with young teens wearing bikinis at beaches. we can always make excuses that it's not seen as sexual, but then what's the utility purpose of bikinis?

seriously...
(double-u, double-u, double-u, dot)independent.co.uk/news/world/europe/french-students-cry-libert-over-right-to-wear-sexy-clothes-1848125.html