I’ve been told that if you dropped your wallet in Tokyo it would still be there with all the money in it.
I believe that. I'm in Japan for work quite often and we joke that if you left your suitcase on the sidewalk and came back an hour later it would still be there but your clothes will have been washed and pressed.
The Japanese have honor, which is a concept that's all but lost in the western world today. They want to be able to look at themselves in the mirror and know that they acted in a manner that they can be proud of.