A plot was discovered at the time of her marriage, in which Naomori SAKAZAKI, the lord of Tsuwano Domain, planned to attack Senhime's marriage procession to abduct her. As a result, Naomori committed suicide (or was killed by his retainers) and the Sakazaki clan was deprived of their samurai status along with their territory (Senhime incident).
この時、津和野藩主坂崎直盛が輿入れの行列を襲って千姫を強奪する計画を立てていることが発覚し、直盛は自害（もしくは家臣により殺害）、坂崎氏は改易処分となった（千姫事件）。