Tokyo police took the unusual step of arresting the leader of a fringe political group and two associates on Friday for allegedly obstructing campaigning of competing candidates in the lead-up to a Diet by-election in April, investigative sources said.Atsuhiko Kurokawa, 45, leader of the Tokyo-based group "Tsubasa no To," Ryosuke Nemoto, 29, its unsuccessful candidate in the April 28 House of Representatives by-election, and a supporter, Hayato Sugita, 39, who was helping on the campaign, were arrested after being accused of disrupting rivals' campaigning activities with loudspeakers, they …READ FULL ARTICLE