He appears in Episode 4 "TAIRA no Koremochi gets killed by a retainer) and Episode 5 "TAIRA no Koremochi punishes FUJIWARA no Moroto" in the volume 25 of "Konjaku Monogatari shu" (Tales of Times Now and Then collection).
『今昔物語集』では巻第25第4「平維茂が郎党、殺され話」、第5「平維茂、藤原諸任を罰ちたる語」に出てくる。