Due to the period of the Northern and Southern Courts (Japan), the power and authority of the Imperial Family and Court noble declined, and at the same time, the Ashikaga Shogun Family's authority advanced on that of the Imperial Family and he practically served the role of the monarch of Japan.
南北朝時代(日本)により、天皇家と公家勢力の権力及その権威が低下すると共に、足利幕府の成立以来、足利将軍家の権威は天皇家に迫り、実質的に日本の君主としての役割を担った。