After the families of officials in charge of practical business became restricted to Kajuji-ryu (the Kanjuji line), the Hino family and Takamune-ryu Heishi (Taira clan of Takamune group) in the twelfth century, persons who became Sanji kentai holder also came to be limited to those who were the members of these three families (exceptions were FUJIWARA no Toshinori/Sadanori, sons of Shinzei).
12世紀に実務官僚の家が勧修寺流・日野家・高棟流平氏に固定化したことに伴い、三事兼帯も自然とこの三家に限定された（例外は信西の子、藤原俊憲・貞憲のみ）。