Or people hired to work on train platforms pushing people to help them squeeze into already packed train cars. (Not sure why I shared that, but a cultural difference you wouldn't see here).
That"s one of the many many famous 'images' of Japan. Reality looks very different though. But indeed, one huge difference btw. J and US, purely geographically, is space confinement.
Imagine millions of people commuting into a megalopolis like Tokyo and everybody was fighting to be the first on the train. Therefore, they regulate traffic -- these days not by pushing more people in but stopping more / too many from entering, cos there are more people waiting at the next station. And trains come every two to three minutes anyway. Call it 'rules', I call it common sense.
In Japan, technology doesn't really separate people that much. On the contrary. What separates people is working conditions and the employment market. But massive landslide changes happening right now...