It included the description that a large island located far away across the sea from Jurchen and Goryeo as an area against the Great Yuan Dynasty, transcribed as 'جمنكوj-m-n-k-w,' which appeared to be a 'country of Japan.'
女直、高麗などから東南海上の彼方に大元朝に敵対する地域として「日本国」の音写とおぼしき「جمنكوj-m-n-k-w」と呼ばれる大島についての記述がある。