Kazuo Hatoyama (鳩山 和夫, Hatoyama Kazuo; 6 May 1856 – 3 October 1911) was a Japanese lawyer and politician who served as Speaker of the House of Representatives from 1896 to 1897. He was the patriarch of the prominent Hatoyama family, father of Prime Minister Ichiro Hatoyama, great-grandfather of Prime Minister Yukio Hatoyama.
