In Japan, drug use is far less common than it is in the U.S. because the culture is much more reactive about it. While I don't believe the reefer-madness-like response to "soft" drugs, I generally think that a society is better off without so much drug use. The reasons for this stem beyond my desire not to be with people who are only half with me, but also relate to the fact that drug use tends to bring a whole host of other problems along with it. I also strongly believe that, if we turn to substances, we never truly manage to manage our inner lives because we run from our issues rather than face them.
Frankly, I'm tired of the debate with people in the U.S. who snarl like rabid dogs at the idea that drug use is anything but a great thing as long as we're talking about whatever drug(s) they happen to favor or use. I miss the fact that Japanese people in general didn't use drugs and saw their use as a far from positive thing.* There were certain arguments I never had there, and this was one of them.
*It is not lost on me that Japanese use alcohol in the way many people use drugs. The main difference is that I knew exactly how to avoid it, and most people experience drunkenness as a continuum - drug use tends to have more binary results - high or not high.