Hōjō Masako, Japanese regent and onna-bugeisha (born 1156)

Hōjō Masako was a Japanese female samurai (onna-musha) and politician who exercised significant power in the early years of the Kamakura period, which was reflected by her contemporary sobriquet of the "nun shogun". She was the wife of Minamoto no Yoritomo, and mother of Minamoto no Yoriie and Minamoto no Sanetomo, the first, second and third shoguns of the Kamakura shogunate, respectively. She was the eldest daughter of Hōjō Tokimasa and sister of Hōjō Yoshitoki, both of them shikken of the Kamakura shogunate.