Although the records of 'Zoku Gunshoruiju' (The Collection of Historical Sources, second series) and 'Family Tree of the KUDONIKAIDO clan' show that four generations of the NIKAIDO family from Koreto, Koreyuki, Koreyori to Yukito served as Totoumi no kami (the governor of Totoumi Province), both records could be created after the establishment of the NIKAIDO clan therefore these descriptions might be fabricated in some parts.
「続群書類従・工藤二階堂系図」では維遠、維行、維頼、行遠の4代が遠江守に任官したことになっているが、いずれも二階堂氏として家を興した後に作成された系図であろうことから割り引いて考える必要がある。