Diet Debate showdown in Tokyo
June 1st, 2011, Tokyo, Japan - Sadakazu Tanigaki, left, leader of Japans main opposition Liberal Democratic Party, greets Prime Minister Naoto Kan before the start of 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)  -mis-.