Japanese Prime Minister Yukio Hatoyama arrives at his official residence in Tokyo June 3, 2010. Japan's ruling Democratic Party was scrambling on Thursday to pick a new leader, and hence premier, after fiscally conservative Finance Minister Naoto Kan threw his hat in the ring to replace unpopular Prime Minister Yukio Hatoyama, who resigned a day earlier ahead of a looming election. REUTERS/Issei Kato (JAPAN - Tags: POLITICS)