As instructed by Shogun Masako HOJO, who was a nun and Yasutoki's aunt, Iga no Kata and her cohorts were expelled, and Yasutoki, now 42 years old, succeeded to the house as the third regent.
伯母の尼将軍北条政子の命によって伊賀の方らは追放され、泰時が家督を相続し、42歳で第3代執権となった。