During the period, two Imperial Courts existed in Japan, the Southern Court (located at the Emperor's residence in Yoshino, Yamato Province), and the Northern Court (in Heian Kyo (Kyoto), Yamashiro Province), and each Court tried to claim sole legitimacy for itself.
この間、日本には南朝(日本)（大和国吉野行宮）と北朝(日本)（山城国平安京）に2つの朝廷が存在し、それぞれ正当性を主張した。