That inspires fear in the heart of evil doers!
One thing that's kind of struck me as telling in Japan is the drug law. Speed and other 'uppers' carry a much lower sentence compared to marijuana use. I don't think they care what you do as long as you're nice and productive.
Shame, though. The one time I went to visit I remember telling my friends that if there was one place in the world that needed weed, it had to be Japan. It's crazy, the one connection I was able to find was a known member of the Yakuza and he charged about $500 US for an ounce. (!!!) Those folks just don't like chilling out.