Kaoru Hatoyama (鳩山 薫, Hatoyama Kaoru, 21 November 1888 – 15 August 1982) was an educator and an administrator, the schoolmaster of Kyoritsu Women's University, which was founded by her mother-in-law, Haruko Hatoyama. She is well known as the wife of Ichirō Hatoyama, who was the 52nd–54th Prime Minister of Japan, serving terms from December 10, 1954 through December 23, 1956. She was the mother of Iichirō Hatoyama, who was Japan's Foreign Minister from 1976 through 1977.