The Northern and Southern Courts were established when Emperor Godaigo escaped Kyoto and fled to Yoshino, established a court and claimed that the sacred treasures that he gave to Emperor Komyo were fake.
後醍醐天皇は京都を脱出して吉野へ逃れて朝廷を開き、光明天皇に渡した神器は偽物であると主張し、南北朝が成立する。