Mr. Minoru NOGUCHI argues in 'TAIRA no Koreshige and TAIRA no Koreyoshi' in "A Research on Togoku Samurai in the medieval period" that he is the one and same as TAIRA no Koreshige, the Yogo Shogun who appears in Episode 4 'TAIRA no Koreshige gets killed by a retainer' and Episode 5 'TAIRA no Koreshige slew FUJIWARA no Moroto' of Volume 25 of "Konjaku monogatari shu" (Tales of Times Now and Then collection).
野口実氏は『中世東国武士団の研究』「平維茂と平維良」において『今昔物語集』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」に出てくる余五将軍平維茂と同一人物と言う説を展開している。