An accurate genealogy cannot be created because a roll of family tree in "Nihonshoki" has been lost, and we can barely know the circumstances at the time from the surviving fragment of "Joguki".
しかし、『日本書紀』の系図一巻が失われたために正確な系譜が書けず、『上宮記』逸文によって辛うじて状況を知ることが出来る。