When Hiormoto became busy with the duty of a betto at Kumonjo (administration office) and Mandokoro (administrative board), Moritoki himself drew up almost all important documents, such as migyosho (documents for informing of decisions made by third or upper ranked authorities) and hosho (a document for informing lower-rank people of the decision of upper people such as an emperor or shogun), although an additional yuhitsu, a substitute of Hiromoto, was supplemented.
広元が公文所や政所の別当の職務に多忙となると、後任の右筆は補われたものの、御教書・奉書などの重要文書のほとんどが盛時の手によって作成された。