Fashion in Japan is completely different to "the west".
In general very short skirts and long socks seem to be in, it seems to be completely acceptable for a 40 year old women to go to work wearing these. I saw a shop assistant in a fairly upmarket store wearing jeans which had the top part of the legs replaced by suspenders.
If you go to the Yoyogi district of Tokyo, this is a meeting place for all the teenagers who dress up like dolls or cartoon characters.
