In all honesty you can basically apologize out of a lot of crimes and police generally don’t bother with anything else unless there’s video evidence, they catch you in the act, or you’re a high profile person involved in a high profile act.
Just never get caught with drugs in your possession, and if you get caught with personal amounts, apologize and cry. Not kidding.
(The inverse is also true: Japan is rather lax about CSAM possession, about to the same degree as America is lax about weed possession. It's technically a crime but most people caught will be let off with a fine and a warning.)
http://fileserver.idpc.net/library/The-history-current-state...
Quite the opposite, in fact. CSAM is a pillar of the manga industry. Enjo kosai (compensated dating) is a cultural norm.
In the US, unless they have a solid case and offer a plea bargain, you’re better off not talking to cops and staying silent until they give up. In Japan, once you know they have somewhat of a case, you’re better off making it easy for the police and immediately apologizing. They mostly just drag people who don’t comply and haven’t really learned their lesson (it’s assumed you won’t be dumb enough to make the same mistake twice).
Most first time drug cases end with an apology, crying, and being let go. Americans make the mistake of thinking not talking will help, so police hold them until they do. It can help in bigger crimes, though, since if the evidence is hard to prove, they’ll just hold you for a while and hope you’ll confess, but if not, often let you go instead of risk losing at a trial.