TOKYO: Japan’s professional football J-League on Thursday announced a fine of two million yen ($17,500) on Gamba Osaka after the club’s supporters waved a flag similar to Nazi SS insignia. The flag, which bore a double ‘S’ in the style of the Nazi paramilitary force, was seen during Gamba’s 2-2 draw against city rivals Cerezo Osaka on April 16. Gamba said late last month that it had told the supporters’ group responsible to disband, and slapped an indefinite ban on the display of all banners by the team’s fans. On Thursday, J-League officials said it decided to punish the club for failing to prevent the incident from happening. The club “immediately identified the supporter group in question and took swift and appropriate measures,” the J-league said on its website.