The ruling Liberal Democratic Party faced criticism Tuesday from the opposition for having a Self-Defense Forces member appear at its recent annual convention to sing the national anthem, potentially breaching legal limits on political activities by serving members.Sgt. Mai Tsugumi, a soprano in the Ground Self-Defense Force's Central Band, sang in uniform at the event in Tokyo on Sunday. The Self-Defense Forces Act limits members' political activities apart from voting.Junya Ogawa, head of the largest opposition party, the Centrist Reform Alliance, told reporters Tuesday the case was "at t…READ FULL ARTICLE