Yukio Hatoyama (鳩山由紀夫 Hatoyama Yukio) (born 2 February1947 in Tokyo) is a politician of the Democratic Party of Japan representing the 18th district of Tokyo in the House of Representatives. He is the grandson of former Prime Minister Ichirō Hatoyama, and son of Foreign Minister Iichiro Hatoyama.
He graduated from University of Tokyo and received a Ph.D. in Engineering from Stanford University. He ran for his father's seat in Hokkaido in #38 and was elected to the House of Representatives.
He became DPJ Party Chairman and leader of the opposition from 1999 to 2002, when he resigned after taking responsibility for the confusion that arose from rumors of mergers with the Ichirō Ozawa's Liberal Party.
He and his brother Kunio Hatoyama are fourth generation politicians.
