Bunin includes Chokunin (imperial appointment); the appointment by emperors, Sonin; the appointment through a report to the throne by Daijokan (Grand Council of State), Hannin; the direct appointment by Daijokan (Grand Council of State), and Hanpo; the appointment by Daijokan (Grand Council of State) through the selection of Shikibusho (the Ministry of Ceremonial) and Hyobusho (the Ministry of Military).
補任には天皇によって任命される勅任、太政官の上奏を経て任命される奏任、太政官が直接任命する判任、式部省・兵部省の選考を経て太政官が任命する判補がある。