It is said that when Soncho was captured and failed to commit suicide, he shouted, 'Cut my head off now! Or, kill me with the poison that Yoshitoki's wife used!,' suggesting that Yoshitoki HOJO, then regent to the shognate, who had died three years before, was killed with poison by Iga no kata, the wife of Yoshitoki (based on the episode described in a diary of Teika FUJIWARA).
捕縛された際に自殺し損なった尊長は、「早く首を切れ。さもなければ義時の妻が義時に飲ませた薬で早く自分を殺せ」と叫び、その3年前における前執権北条義時の死去がその室伊賀の方による毒殺であったことを示唆したとされる（藤原定家の日記の記述による）。