The jokos who conducted Insei established Incho (院庁) as their own political office and therefore issued written orders such as Inzen (院宣)/In-no-cho Kudashibumi (院庁下文), etc.
院政を布く上皇は、自己の政務機関として院庁を設置し、院宣・院庁下文などの命令文書を発給した。