And it is recorded that his father, FUJIWARA no Yukito, was deported to Owari in the Hoen Era (1135 - 1141) for his killing of the provincial governor of Totoumi Province, and Yukimasa was born to the younger sister of FUJIWARA no Suenori, the Atsuta daiguji in Owari Province, during that period.
ただし父は藤原行遠は保延年間（1135～1141年）に遠江国司を殺害して尾張に流配されており、そのときに熱田大宮司藤原季範の妹との間に行政が生まれている。