国民新党
In the 2009 lower house election, the DPJ gained an historic majority, being the first non-LDP party to hold a majority in that house since the LDP's formation and is scheduled to lead the second non-LDP government in the aforementioned time period (with upper house allies the Social Democratic Party of Japan and the People's New Party). Following the election, Aso resigned as LDP president. Sadakazu Tanigaki was elected the leader of LDP on September 28, 2009.