[mkehrt]

Have you been to Tokyo? The subway consists of several disjoint systems that don't connect in reasonable ways, each with its own incomprehensibly different payment system, and it stops running at around midnight. New York beats it by a mile.

[omegaworks]

Obviously you haven't been in a while. Nowadays they have the SUICA card tap and go that negotiates payments for you.

It does stop running, but Tokyo doesn't. That's why capsule hotels and suitcase lockers.