Adult videos, like other creative works, are protected by copyright laws. Distributing or accessing these materials without authorization can infringe on the rights of the creators and owners.
On the other hand, it can also:
Kyoko Nakajima (中島京子), a well-known performer in the mature (Jukujo) category. JUQ-468 Free
In many cases, alphanumeric codes like "JUQ-468" are associated with: Adult videos, like other creative works, are protected