The common belief stated above is a theory which identified the "rumor" of the Iga clan's rebellion described in the article of June 28th of Joo era in "Azuma Kagami" (a chronicle of the early history of the Kamakura bakufu) as a fact.
上記の通説は幕府の編纂書『吾妻鏡』貞応3年6月28日条に記された伊賀氏謀反の「風説」を事実と認定した上での説だ。