Funny thing is, those censorship laws existed first because of Victorian morals being introduced, and then, after WWII, occupation officers didn't see any need to change that. To this day, the Japanese government just doesn't want to deal with it. And it is stupid.
I can deal with a few tiny black bars here and there, but the white hole censorship? Yeah, if I were Mentaiko, I'd get tired of detailing dicks too.