Japan's ruling Liberal Democratic Party presidential election candidates (L-R) former administrative reform minister Nobuteru Ishihara, former defence minister Yuriko Koike, former foreign minister Taro Aso, former defence minister Shigeru Ishiba, and Economics Minister Kaoru Yosano shake hands at start of their debate session for the party's presidential election to become the next Japanese prime minister, at the Japan National Press Club in Tokyo September 12, 2008. [Agencies]