I can completely imagine this happening. . .My first year in Tokyo, I wondered to my Japanese and expat friends why there were so few public trash bins.  Mostly I was told that people born and raised in Japan take their trash with them. 

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http://sports.yahoo.com/blogs/soccer-dirty-tackle/japanese-fans-clean-up-their-section-after-world-cup-match-against-ivory-coast-015533399.html

Japanese fans clean up their section after World Cup match against Ivory Coast

By Brooks Peck June 15, 2014 9:55 PM Dirty Tackle

 

The Ivory Coast came from behind to beat Japan 2-1 in their first 2014 World Cup match, but despite the tough loss, the Japanese fans in attendance at the Arena Pernambuco in Recife, Brazil still made time after the final whistle to clean up after themselves.

As the stadium emptied, some Blue Samurai supporters walked up and down the aisles filling trash bags. Though this is a customary practice at Japanese sporting events that has been carried over to previous World Cups, it's still something most fans from other parts of the world wouldn't even consider doing.

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(Yahoo Brasil)

But the respectfulness wasn't just limited to the fans. Before the clean-up began, the Japanese players lined up and bowed to their loyal supporters. Though players often applaud their fans after a match, the world would be a slightly better place if more people felt the desire to pick up after their neighbor and do the occasional group bow.

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(Photo by Clive Rose/Getty Images)