Iemori exuded a powerful presence to threaten the position of his older half-brother TAIRA no Kiyomori but died of illness on the way to Kumano while accompanying Emperor Toba in 1149.
兄・平清盛の地位を脅かすほどの存在だったが、保安元年（1149年）に鳥羽天皇に御供して熊野に赴く途中で病没。