However, following the abdication of Emperor Sanjo, Seishi's son, Imperial Prince Atsuaki's renouncement of his claim to the title of Crown Prince and Seishi's death, it appears that he retired as Kami of Iyo with the rank of Jushiinojo, the highest positions he reached, and sometime between 1024 and 1027 at the latest he entered the priesthood.
だが、三条天皇の退位、娍子所生の敦明親王の皇太子辞退、そして娍子の死などもあり、従四位上伊予守を極位極官として遅くても万寿年間には出家していたようである。