A Japanese language teacher made a video-playing in the classroom about the behavior of Japanese football fans after an international game finished . The teacher said: "My students, although the game is over, the Japanese are picking up all their trash. What is the high level of the Japanese themselves? "radiation，radiation，radiation"the same answers came from the classroom. https://scienceinfo.net/japan-detected-high-levels-of-radiation-in-ikebukuro-park.html https://www.bbc.com/news/world-asia-56252695 https://www.history.com/topics/world-war-ii/bombing-of-hiroshima-and-nagasaki