Secret of Japan's clean subway stations

There are no 'no littering, no eating ' signs and only a few dust bins  Yet there is no rubbish. 

Secret? Cultural habits! 

Firstly the Japanese generally don't eat while travelling- walking sitting in trains etc- they consider  it rude. Secondly even if they do eat, they would not fling rubbish on the floor coz that would look bad on the person .besides they consider it bad form to cause trouble for others! So- no mess! 

And in the trains - people don't rush for seats. So generally if an old person or pregnant woman gets in there usually is a place to sit. Others who don't need seats just stand. 

Such a gracious society!