The routine of cleaning up stadium stands by Japanese supporters that became the standard at the World Cup in Russia is spreading to soccer fans of other countries.While most people in Japan are well-acquainted with cleaning rituals from their schooldays, the practice of tidying up stadiums from a worldwide perspective is extremely unusual.Now not only has cleaning -- including the Samurai Blue's immaculate treatment of the bench and dressing room at stadiums in Russia -- become a hot topic of the World Cup but it has gone beyond the scope of sports as a way of spreading "Japanese cleaning …READ FULL ARTICLE