You are either underage, or super naive. In which case I don't recommend you ever moving out of your mom's house because the world will eat you alive. No one is taking drugs in JAV. It is all props. Maybe, and I mean a hard MAYBE, you could make a case for some early 00s or 90s and earlier movies having some dubious content, as some films did indeed cross the line back then. But 99% of what you are watching is all fake; some movies even use fake penises.
Every pill is fake
Every drink shown to be alcohol is likely fake. At the very least no one is drinking more than a sip if it does happen to be real.
99% of every single JAV shot with a major label in almost a decade uses fake cum.
Ceampie? Fake cum
Cumming in mouth? Fake cum
Gokkun? Not always, but usually Fake cum
Facials? The most real, but some movies with fake cum here and there.
Until some Japanese politician wants to champion and die on the hill of decensoring porn, you will never get rid of fake cum and fake dicks.