I wonder if there are unexpected crimes that a foreigner would commit in Japan that would land her/him in jail. Things like disposing of plastic bottles in the wrong bin (a hopefully absurd example) ...
[0]: https://nymag.com/vindicated/2016/11/truth-lies-and-videotap...
Maybe they think I'm a narc.
Life is weird sometimes.
In a big city in the USA, if you want to be offered drugs on the street, you need to look well put together, and be in a luxury district.
Stay in a high end boutique hotel in manhattan, dress well, and you'll have someone offer you drugs almost every day.
Even if it's marijuana. It's not worth it. Don't do it. Don't be around it.