However, to prevent boorish daimyo, who served in the position alone, from behaving in an impolite manner toward messengers of the emperor or the retired emperor, there was a rule that Koke-kimoiri (a kind of mentor for nobles who was familiar with manners and rules of etiquette that had to be observed for members of the Imperial Court) served as an instructor (or an adviser) for Kyooyaku daimyo.
だが、武骨な大名が一人でつとめて天皇や上皇の使者に対して無礼があったりしてもいけないので、饗応役の大名には朝廷への礼儀作法に通じた高家肝煎が指南役(口添え役とも)につくのが決まりであった。