Well, I can think of two possibilities: 1) Japan has scalably solved mental illness to the point that, in expectation, you will never be near someone still suf

Well, I can think of two possibilities: 1) Japan has scalably solved mental illness to the point that, in expectation, you will never be near someone still suffering therefrom. 2) Japanese law enforcement doesn't f--- around when it comes to train etiquette, and even so the most dangerous people don't mess with riders.