Since the imperial throne itself may be approved by the retention of the three sacred imperial treasures, the Nanbokucho-Seijunron (argument on legitimacy of either Northern or Southern Court) has a basis for its denial of orthodoxy of Hokucho (Northern court) which ascended to the throne without the three sacred imperial treasures.
皇位そのものの証明は三種の神器の所持を以て挙げられるため、南北朝正閏論に於いては神器が無いまま即位した北朝(日本)の正当性が否定される根拠の一つとなっている。