As rare cases there were only a few examples of promotion to Udaijin (Minister of the Right) (Saneeda SANJONISHI and Michimi NAKANOIN) and actually there were few examples where a member of the house of minister was promoted to the higher position than Naidaijin.
希に右大臣に昇進した例（三条西実条・中院通躬）がある程度で、現実には大臣家から内大臣を超えて昇進した事例は少ない。