sentences:  He supported Yuriko Koike in the 2008 LDP leadership election, which was ultimately won by Taro Aso.Watanabe formed Your Party as a splinter from the Liberal Democratic Party prior to the 2009 general election.His party ran on a platform of downsizing Japan's vast bureaucracy, but managed to win only five seats in the election, which was a resounding victory for the opposition Democratic Party of Japan.