The 4 emperors of the Gokogon line, Emperors Gokogon, Koenyu, Gokomatsu, Shoko were on the throne, whereas descendants of Emperor Suko who were the elder brothers, were eliminated from the succeeding line and existed as the hereditary Imperial Prince line, the Fushiminomiya ke, and there is said to be a conflict between the two lines within the Northern Court regarding Imperial succession.
後光厳、後円融天皇、後小松天皇、称光天皇と4代にわたって後光厳系が皇位についた一方、兄筋の崇光上皇の子孫は嫡流から排されて世襲親王家である伏見宮家として存続し、北朝内部でも皇位継承をめぐる両系統間の確執があったとされている。