On January 13, 1118, as a daughter of her foster father, the Shirakawa in, Shoshi made an Imperial Consort's bridal entry into court of her father's cousin, Emperor Toba, four days later, she received an imperial letter to be appointed as a high-ranking lady in the court.
永久5年（1117年）12月13日、白河院を代父として、父方の従弟鳥羽天皇に入内、4日後には女御の宣旨を蒙った。