A Japanese TV show has cancelled an appearance by hugely popular K-pop group BTS, amid controversy over a shirt worn by one of the band members.A picture of Jimin wearing a T-shirt depicting the US atomic bombing of Japan, which killed hundreds of thousands of people, started being shared online. It stirred anger among some Japanese BTS fans, who called it an “insult”. BTS later apologised to its fans for not being able to make an appearance. The “atomic bomb” T-shirt also featured Korean independence slogans. It was seen by some in Japan as celebrating the bomb which eventually led to the independence of the Korean peninsula from Japanese colonial rule. Japan and Korea’s shared wartime history remains an extremely sensitive topic in both countries.