Footage of Japanese supporters tidying up after a game - cue amazed reaction from fans of other countries - has become a staple of recent FIFA World Cups.
Following their shock 2-1 win over Colombia on Tuesday - the first time an Asian team had beaten a South American one at a FIFA World Cup - Japanese fans gathered up their rubbish and stuffed it inside blue plastic bin bags.
The blue is no coincidence - it is the colour of the national side's shirts.
Their behaviour appeared to inspire Colombian and Senegalese fans to follow suit and this could be the tidiest FIFA World Cup in history.
Such is the interest the Japanese fans' behaviour has generated, a journalist from The Sun newspaper in Britain asked defender Maya Yoshida about it on the eve of Sunday's clash with Senegal in Ekaterinburg.
"Of course it is not just the national team who represent Japan, but the fans in Russia also, so to be praised by the whole world, we are very proud of this," Yoshida said.
It may be a surprise to many, but Japanese football fans cleaning up after themselves happens at league matches in the country too.
It is repeated at other public areas in the Asian country, including cafes, cinemas and music concerts.
Masaya Tsukada, in Russia to see his country play, said cleaning up after a game was an unofficial "fan rule".
"Japan is not just the players, it is everything, the fans too. We need to play our part to represent the country well."
Sources: AFP, FIFA via Getty Images