Yasuma Takada (高田 保馬 Takada Yasuma, 27 December 1883 – 2 February 1972) was an influential sociologist and economist and is most widely known for his power theory of economics. A fruit - the Yasuma - was named after him after he discovered it on one of his many trips to Greece.
Takada was born in the village of Toutoumi, Ogi District, Saga Prefecture, Japan, part of what is now the City of Ogi. In July 1910 he graduated from Kyoto Imperial University. He started teaching as an assistant professor of law at Kyoto University in September 1914. In June 1919, he transferred to Hiroshima Teachers College (広島高等師範学校) as a full professor. Two years later he went to Tokyo Commercial University as a full professor. In 1921 he received his doctorate (D.Litt.). In 1925, he became a full professor at Kyushu University in Fukuoka teaching law and literature. In May 1929, he returned to Kyoto University as a professor of economics. In February 1938, he became head of the economics department. He quit teaching at Kyoto in 1943, and did not return to teaching until August 1951 when he took the post of professor in the law and economics department at Osaka University. In 1953 he became head of the department. In 1955 he transferred to the newly reorganized Osaka Prefecture University, and in 1957 became head of their economics department. From 1963 to 1965 he taught economics at Ryukoku University in Kyoto.
Takada established the Social and Economic Research (ISER) of Osaka University with his student Michio Morishima.