Prime Minister Naoto Kan (L) and the Democratic Party of Japan's powerbroker Ozawa leave a venue after their news conference in Tokyo September 1, 2010. Kan and powerbroker Ozawa faced off over fiscal policies on Wednesday in a battle for party leadership that is threatening a policy vacuum as Japan confronts a strong yen and weak economy. REUTERS/Kim Kyung-Hoon (JAPAN - Tags: BUSINESS HEADSHOT POLITICS)