TOKYO—Tokyo 2020 Olympics chief Yoshiro Mori resigned on Friday and again apologised for sexist remarks, leaving the troubled Olympics searching for a chief five months from the start. “My inappropriate comments caused a big trouble. I am sorry,” Mori, 83, said at an Olympic organising committee meeting. He said the most important thing now was for the Tokyo Olympics to be a success. His resignation only months before the postponed Summer Games are scheduled to begin will further erode confidence in the organisers’ ability to pull off the event during a coronavirus pandemic. Mori, a former Japanese prime minister, sparked a furore when he said during an Olympic committee meeting earlier this month that women talk too much. After calls for him to be sacked, he apologised for his comments but refused to step down. On Thursday, Mori asked the mayor of the Olympic village, 84-year-old Saburo Kawabuchi, to take …