When Waiting for Trains at the Tokyo Train Stations...
I am originally from a small town in Fukuoka prefecture, so when I visited Tokyo for the first time two years ago, I found some surprising “rules”.
For example, when waiting for trains at the train station platform, you have to line up where the train doors are expected to open. I did not know about this. I found out this rule when I was waiting for my train one day, and people started to line up behind me! I was very surprised. But this is to control the overcrowded platform especially during the rush hours. Usually, there is a sign on the ground that indicates where the door is suppose to open, so if you are one of the first ones on the platform, make sure to stand where the sign is!