Quote Originally Posted by T1ooo View Post
to combat the declining population and birth rates in japan, as part their visa conditions they must come back to japan pregnant
Haha, this might be it.

OP has a point. Take a look around agencies. Lots of J girls, and ONLY J girls, openly advertising BBFS and CIP for extra.

From my experience, the C girls don't advertise it, rarely allow BBFS and even rarer still allow CIP. Yet most of them do CIM. I don't think they're stupid enough to think that CIM is safer than BBFS from an STI POV, so I'm guessing that most of the C girls must be averse to using their own contraceptives for whatever reason.

K girls are somewhere in the middle. A lot more common among them, but I've never seen one that openly advertises it.