When in no hyojo (council presided by the Retired Emperor) came to be held regularly in the era of the Retired Emperor Gosaga, a person in this post became a responsible person of a rule by a Retired Emperor as a leading figure among hyojoshu (members of the Retired Emperor's council).
後嵯峨院院政の時代に院評定が積極的に開催されるようになると、評定衆の中心人物として院政の実務の責任者となった。