One explanation often cited is simple: the behaviour is taught early. The report says many children in Japan grow up helping to clean their own school environment rather than treating tidiness as somebody else’s job.
That helps explain why the act rarely looks performative. It tends to appear calm, organised and matter-of-fact. A phrase quoted in the report captures the idea neatly: “Tatsu tori ato wo nigosazu” - leaving a place as it was found.
The custom also appears to fit a broader social code. The report points to the idea of “meiwaku”, a cultural emphasis on not causing inconvenience to other people. In a crowded society, that mindset can shape everyday behaviour just as much as big-match moments.
There is also a practical layer. Public spaces in Japan are often described as having relatively few bins, so people are used to managing their own rubbish. In that context, taking litter away from a seat at full-time feels less like a special gesture and more like standard public behaviour.
What began attracting wider notice around 1998 has since become part of Japan’s international image. The report says similar scenes were seen again in 2018 and 2022, with players also helping to tidy a dressing room after defeat and supporters later leaving thank-you messages on rubbish bags.
That visibility matters. Once a behaviour is praised abroad, it can also become a point of national pride at home.
The next time Japan appears on a major international stage, the football will still be the headline. But once the final whistle goes, the stands may again tell their own story.