After that, a practice was established in which the successor was chosen from omote yuhitsu when 'oku yuhitsu' had a vacant position, and the official duties began to be divided.
その後、「奥右筆」に空席が出来た際には表右筆から後任を選ぶ慣例が成立して両者の職掌の棲み分けが図られるようになった。