Hōjō Masako

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Hōjō Masako, from Kikuchi Yōsai

Hōjō Masako ( Japanese 北 条 政 子 ; * 1156 ; † August 16, 1225 ) was the firstborn child of Hōjō Tokimasa and his wife Hōjō no Maki .

Her father was the first shikken , or regent, in the Kamakura shogunate . She was also the sister of Hōjō Yoshitoki , and was married to Minamoto no Yoritomo , the first shogun of the Kamakura era. She became the mother of Minamoto no Yoriie and Minamoto no Sanetomo , the second and third Shoguns, and played a prominent role in Japanese history .