Jogo was a system by which those aspiring to a government post would either pay directly to gain an appointment, or pay for expenses that would otherwise have had to be paid from the coffers of the Imperial Court, such as those incurred in carrying out public functions or events for the Imperial Court, building or repairing the palace, or repairing the buildings and pagodas of shrines and temples.
成功(じょうごう)とは、朝廷の公事・行事及び殿舎の営繕、寺社の堂塔修造費用など本来、朝廷の公費で負担すべきところを、任官希望者を募り任料を納めさせるか、または自己負担でそれぞれの事業の功を成らせて、見返りに官職に叙任するという売官制度の一種である。