The best photos from catalogues japanese braless and girls erotic sleep nude photos
I agree with the above- it is not really acceptable in Japan, and you can expect disapproving looks from some women, and possibly unwanted stares from some men if you don't wear a bra and it is at all obvious.
If it doesn't bother you, there is not reason you don't go braless.
Is this acceptable in public?
Description: Generally, as along as a person is wearing clothing, just being braless doesn't constitute a crime in Japan.