In 1103, he accepted the post of investiture of the Crown Prince and further concurrently took the post of Togu gakushi (teacher of the Classics of the Crown Prince) (when the Crown Prince was 7 months old).
康和5年（1103年）には立太子を受けて東宮学士をも兼ねる（ただし、東宮宗仁親王は生後7ヶ月）。