Oku Mumeo (October 24, 1895 – July 7, 1997) was an important Japanese feminist politician who served three terms in Japan's Imperial Diet after having been a leader in the early modern Japanese suffrage movement.
She played an important role in various early Japanese women's rights movements and she was a crucial part of Japan's consumer movement.
She was a renowned activist in the 1920s, co-founding the New Women's Association with Hiratsuka Raicho and Ichikawa Fusae, and eventually held a seat in the House of Councilors from 1947 to 1965 when she retired.