However, UMEWAKA pointed out that the most important esthetic concept in Zeami's theory of Noh is not "Yugen (Subtle and profound)" but "Myo (Strangeness)" and "Yugen" is not a ruling principle of Noh from the aesthetic aspect.
ただし、梅若猶彦は世阿弥の能論における最も重要な美的概念が「幽玄」ではなく「妙」であることを指摘しており、「幽玄」が能の美的側面における支配原理というわけではない。