Japanese girls aren't that short, they're mostly just tiny in circumference - I saw many girls my height there, and I've got 6cm on you :) There are even some Takarasiennes like that, and they've been getting taller - nowadays someone like Maki who's 164cm (and claimed 165cm while in the Revue) would have been shoved into the musumeyaku ranks. Add 7cm of heel to it...

(Though Elisabeth was a sight - Kacha's got an inch or two on both Asako and Kiriyan.)