Yukio Hatoyama (born 11 February 1947) is a Japanese politician. He was born in Bunkyō, Tokyo. He was Prime Minister of Japan starting in 2009 and resigned in 2010. He was a member of the Democratic Party of Japan until 2012. His brother, Kunio, is also a politician. He is married to Miyuki Hatoyama. In 2013 Japan's defense minister called Hatoyama a 'traitor' for his acknowledgement of the land dispute between China and Japan.