Due to Bifukumonin and Tadamichi's slander, Tadazane and his son Yorinaga were kept away from the Palace of the retired Emperor after the premature death of Emperor Konoe (the beloved son of retired Emperor Toba); however, Taishi fulfilled an important role in easing the relationship between them.
殊に鳥羽院の愛児、近衛天皇が夭折してしまって以後は、美福門院や忠通の讒言によって忠実・頼長父子は院から疎遠されて行ったが、泰子はその間に立って重要な緩和作用を果たした。