Japanese football fans in a limelight for picking up garbages in the World Cup stadium:
https://www.nytimes.com/2022/11/27/sports/soccer/japan-fans-clean-up-world-cup.html?smid=nytcore-ios-share&referringSource=articleShare
It’s true that the Japanese culture, at home & in school, encourages cleaning up after yourself and sometimes even after someone else.
One of the Japanese phrases I like:
「発つ鳥 跡を濁さず」
Translation:
“A departing bird leaves no muddy traces”