After the death of Yoshitoki HOJO in 1224, his widow, Iga no kata, aspired to make her son, Masamura HOJO, the shikken (close advisor to the shogun and the second highest position in bakufu), and her son-in-law, Sanemasa ICHIJO, the Shogun, and caused an incident known as the Igashi no hen.
元仁元年（1224年）、北条義時が病死すると、後家の伊賀の方が自分の実子である北条政村を執権に、娘婿の一条実雅を将軍に立てようとした伊賀氏の変が起こる。