>>4818737They don't change, per se, more that the considerations and environment around them change.
On a good day you can get away with slight censoring and stating the girl as being a "Third Year."
But if someone shits the bed and gets caught by the moral guardians, for the next year or so you gotta keep your mouth shut.
Cuz technically, it's all illegal. All of it. All porn made in Japan is technically illegal.
But what's "illegal" and what's "acceptable" in Japan are two different things.
I can go to my local family mart and buy porn that's on display for all to see. But if someone made a stink about it tomorrow, it could all be gone by next week.
Japanese laws are strict, but if you keep your head down and your mouth shut, you can get away with quite a lot.
..not that I do anything like that of course.