Recently, however, a theory suggesting that the expression, 'the greatest Tengu in Japan' was a phrase describing Yasutsune and not the Retired Emperor Goshirakawa emerged (as offered by various people including Fumihiko GOMI) which was contradicted by an argument going back to the initial theory that the said phrase was after all describing the Retired Emperor Goshirakawa.
しかし近年、この「日本一の大天狗」との表現は後白河院ではなく、泰経を指した文句ではないかとする説が浮上し（五味文彦など）、さらにまたそれに対して、やはり後白河院を指したものであろうとする再反論も出ている。