However, when it came to surface that there was a strife between Motomichi KONOE and him, it created a clash with the Taira family who supported KONOE, and Moronaga was dismissed from his court office during the coop d'etat triggered by TAIRA no Kiyomori (Jishosannen no seihen (coop of Jishosannen)) in November 1179 and was exiled to the Owari no kuni (Owari Province).
だが、近衛基通との確執が表面化すると次第に基通を支援する平家との衝突を招き、1179年11月に平清盛のクーデター（治承三年の政変）が起こると師長は清盛によって解官された上、尾張国に流罪に処された。