According to 'Sonpi Bunmyaku' (a text that records the lineages of the aristocracy) and 'Family Tree of the NIKAIDO clan', the NIKAIDO family had been ranked Jugoinoge (Junior Fifth Rank, Lower Grade) for generations; Koreto and Koreyuki served as Suruga no kami (the governor of Suruga Province) and Koreyori worked as Totoumi gon no kami (the governor of Totoumi Province).
「尊卑分脈・二階堂系図」によれば維遠、維行が駿河守、維頼が遠江権守で代々従五位下。