Japan fans left the stands spotless after their World Cup opener against the Netherlands in Texas on Sunday, saying it was “Japanese culture” to tidy up after themselves.Spectators stayed behind after the 2-2 draw to make sure they left the stadium as they found it, meticulously picking up litter and stuffing it into blue plastic bags.It was a habit first learned at primary school, Japan fan Eita Tanaka said.“We have to think about everyone. Japanese people think that when we use a certain...