As for the "lower regions," (ahem) one gal was shaved smooth and the other was shaved but had about a week's worth of growth. A gal a friend was with had a racing stripe. So it seems the current "fashion" of shaving is reaching Japan to some degree.
I've seen younger women in onsens and sentos seemingly wrapped up in the image as well, although I wonder with some of them thin enough for their ribs to show through if it isn't a thinning the hard way, via a starvation diet than razor?