It is said to be a work of Sojo TOBA, Kakuyu, however, there is no historical record to prove it, and moreover, there is no way to confirm that he was in fact involved in it.
覚猷（とばそうじょうかくゆう）の作、と伝えられるが、それを示す資料はなく、むしろ鳥羽僧正の筆が加わっているかどうかも確かめがたい。