At first, Bugyonin were referred to as Yuhitsu (private secretary), were assigned to the judicial institution called Hikitsuke and were put in charge of drafting hosho (documents informing lower-ranked people of decisions made by those in the upper ranks) and migyosho (documents to inform people of decisions made by those in the Third Rank or above).
当初、引付と呼ばれる裁判機関に右筆と呼ばれる奉行人を配置して奉書・御教書などを作成した。