Bunin was considered as a benefit brought by an appointer, and therefore, the person who was appointed was expected to give the appointer jogo (ninkan) (recruiting officials for court works and spending the money they paid for the post for the work expenses) or rewards as a manner.
補任は任命者による恩恵であると考えられており、補任された者は任命者に対して成功(任官)や礼銭を贈ることが礼儀とされていた。