Chizuko Ueno (上野 千鶴子, Ueno Chizuko, born July 12, 1948, in Toyama Prefecture)[1] is a Japanese sociologist and Japan's "best-known feminist".[2][3] Her work covers sociological issues including semiotics, capitalism, and feminism in Japan.[1][4] Ueno is known for the quality, polarizing nature, and accessibility of her work.[5] She was married to historian Daikichi Irokawa.[6]