Akio ABE studied the additions to the tales that had existed in those days, like "The Tale of Ise," "The Tale of the Bamboo-Cutter," "Heichu monogatari (Tales of Heichu)," "Utsuho monogatari (The Tale of the Hollow Tree)," "Ochikubo monogatari (The Tale of Ochikubo)," "Sumiyoshi monogatari (The Tale of Sumiyoshi)," and he said, 'First of all, when the 'tales' in those days were handed down to the next generation, it was usual in some way to add some texts to the original manuscripts, and therefore it would be exceptional if these manuscripts were passed down without the addition of texts.'
阿部秋生は、『伊勢物語』・『竹取物語』・『平中物語』・『宇津保物語』・『落窪物語』・『住吉物語』など、当時存在した多くの物語の加筆状況を調べた上で、「そもそも、当時の「物語」は、ひとりの作者が作り上げたものがそのまま後世に伝えられるというのはむしろ例外であり、ほとんどの場合は別人の手が加わった形のものが伝えられており、何らかの形で別人の手が加わって後世に伝わっていくのが物語のとって当たり前の姿である」とした。