A "cloistered emperor" refers to a ruler who, while still holding the title of emperor, is isolated from the public and the day-to-day affairs of governance. This term is often associated with the Japanese imperial system, particularly during the Heian period, when emperors would abdicate in favor of a regent or shōgun, retreating to a life of seclusion. In this context, the cloistered emperor maintained a ceremonial role and influence but was physically removed from political power. This arrangement allowed for a unique balance of authority, where the emperor's spiritual and cultural significance remained intact, while actual governance was handled by others.