It seemed that several people were involved in drawing portraits, and their painting style was that of a later period than the style employed in the portrait of the Emperor Gotoba (Minase-jingu Shrine collection, National Treasure) that is highly likely to be the work of Nobuzane.
絵の筆者は数人の手に分かれており、信実筆の可能性が高い後鳥羽天皇像（水無瀬神宮蔵、国宝）よりは様式的に時代が下るものと思われる。