Benkan (Oversight Department: division of the daijokan responsible for controlling central and provincial governmental offices) and Gekikyoku (Secretaries' Office) of Daijokan (Grand Council of State) were previously recognized as important institutions to issue emperors' imperial rescripts and official documents from Daijokan to local governments, but after Insei started, In no cho replaced those institutions.
従来、太政官の弁官・外記局が、天皇の詔勅や太政官符を発給する枢要機関として重要視されていたが、院政の開始後は、院庁がそれらの機関に取って代わったのである。