Yukio Hatoyama comes from four generations of politicians from the ruling LDP, which his DPJ party just ousted from power.
Exit polls on Sunday gave the Democratic Party of Japan (DPJ) more than 300 seats in Japan's 480-seat Diet (parliament), ending more than 54 years of nearly unbroken rule by the Liberal Democratic Party.
The Democratic Party of Japan has promoted women and younger candidates who have not risen through traditional routes to power.
Japan’s Aug. 30 elections confront Prime Minister Taro Aso’s ruling Liberal Democratic Party with the worst crisis in its history.
Yasuo Fukuda's term was beset with political gridlock and economic problems.
The opposition rejected a second candidate Wednesday.