Japanese Prime Minister Naoto Kan, standing at right, answers to Sadakazu Tanigaki, leader of Japans main opposition Liberal Democratic Party, during a Diet showdown in Tokyo on Wednesday, June 1, 2011. Tanigaki urged Kan to step down but the prime minister refused to relinquish his post during the rowdy debate repeatedly marred with heckles. It was the first time the pair has squared off in parliament since the May 11 disaster. (Photo by Natsuki Sakai/AFLO)
