Thailand's Prime Minister Abhisit Vejjajiva (R) shakes hands with Japan's Prime Minister Yukio Hatoyama upon his arrival at the state guest house in Tokyo November 6, 2009. (Reuters)

Japanese Prime Minister Yukio Hatoyama (3rd L) poses with (L-R) Cambodian Prime Minister Hun Sen, Laotian Prime Minister Bouasone Bouphavanh, Myanmar Prime Minister Thein Sein, Thai Prime Minister Abhisit Vejjajiva and Vietnamese Prime Minister Nguyen Tan Dung prior to the Mekong-Japan Summit Meeting at Hatoyama's official residence in Tokyo November 6, 2009. The two-day meeting is held to develop the relationships with Japan and five countries of the Mekong region. (Reuters)