All Japanese: I live in the middle of nowhere, pretty much fully gone native (the only time I use English is online, in places like this). The down side is that I stand out like crazy; no hope of a subtle transition away from prying eyes :3
It does sound like a cultural thing, then. For all that Japan is a very conservative society, there aren't a lot of hangups about bodies, nudity and so on. Unfortunately that also means that it's pretty normal for men to make really vulgar comments about any women around them, which I've already started to experience.
Pretty small here too, although padded bras can work wonders. But since I'm only just short of a year in to HRT, I'm hoping for quite a bit more in the future.