The supposition presented by Eiko KOBAYASHI that, together with 'Ten Quires of Uji,' the chapters of 'Nioumiya,' 'Kobai' and 'Takekawa' were written by a different author and inserted into the work;
「匂宮」「紅梅」「竹河」は宇治十帖とともに後人の作を補入したものであるとの小林栄子による説。