Despite the fact that Myoun was a Buddhist monk of the highest level, he took human lives on the battlefield before finally dying in battle himself, and Jien, who received religious precepts from him, was highly critical of this in his work entitled "Gukansho."
なお、最高位級の僧侶の身でありながら自ら戦場において殺生を行い、その挙句に戦死したという事実に対して、明雲から受戒を受けた慈円は『愚管抄』において激しくこれを糾弾している。