Ichirō Hatoyama
Kunio Hatoyama was born in Tokyo in 1948. He was a son of Yasuko Hatoyama and Iichirō Hatoyama, a bureaucrat who later became a third-generation politician, and grandson of Ichirō Hatoyama, who became the President of the Liberal Democratic Party (LDP) and Prime Minister of Japan between 1954 and 1956. His brother Yukio Hatoyama, also a politician and leader of the rival Democratic Party of Japan, became the country's Prime Minister in September 2009 following a landslide victory in the August 2009 election. His maternal grandfather was Shōjirō Ishibashi, founder of Bridgestone.