Mumeo Oku (奥 むめお, Oku Mumeo, October 24, 1895 – July 7, 1997) was an important Japanese feminist and politician who served three terms in Japan's Imperial Diet after having been a leader in the early modern women's suffrage movement in Japan.

[2] She was a renowned activist in the 1920s, co-founding the New Women's Association with Hiratsuka Raichō and Ichikawa Fusae, and eventually held a seat in the House of Councilors from 1947 to 1965 when she retired.

[8] In late 1919, she received a visit from Hiratsuka Raichō who asked if she would be interested in co-founding a new organization, the New Women's Association, with the intention of petitioning the 42nd Diet on reforms to Article 5 of the Police Safety Regulations and also a petition to prevent men infected with a venereal disease from marrying[9]Following the failure to revise Article 5, Ichikawa left for America, resigning her position as the head of the organization, and Raichō suddenly moved to the foot of Mt.

[10] Finally, on March 25, 1922, Oku Mumeo and the New Women's Association would succeed in revising Article 5 in the last day of the 45th Diet.

[15] She is survived by her son, Kyoichi Oku, and her daughter, Kii Nakamura, who, like her mother before her, served as chairman of the Housewives' Association.