A document transmitted from Naishi (a maid of honor to the emperor) to Kurodo no to was called 'Naijisen,' which developed to 'Nyobo hosho' (letters sent by the court ladies by imperial order) in and after the 'Kamakura period.'
内侍から蔵人頭に伝えられる文書は「内侍宣｣と呼ばれ、｢鎌倉時代｣以降に｢女房奉書｣へと発展する。