On a related subject, if you want to accurately capture the anime "look," you will produce a face that looks "young."  There is no way around it (that is, for the typical anime female -- there are certainly older faces in anime!)

It's sort of like "paint some cherubim, but don't make them look like babies."  Not going to work.  (Not, that is, unless you listen to Madelyne d'Engle -- but I digress....!)

But hitting the problem from a different direction; a high school student in Kyoto may wear a sailor suit uniform with a skirt length well above her knees.  But you put a western actress in a school uniform with a short skirt, it is going to imply one thing and one thing only to a western audience.  And that one thing is not reading, writing, nor arithmatic.

The most innocuous of poses, the most innocuous of outfits, can be within the right (wrong) context read as extremely sexual.  Sometimes a cigar just wont stay a cigar.