There is no doubt that this folding screen, which has neither a seal nor a seal, is Tawaraya Sotatsu (birth and death unknown). Korin Ogata and Hoitsu Sakai after that have created works that imitate this.
The gold leaf stuck here emphasizes the shape of the object to be drawn, and works as a decorative effect that the gold itself has innately. Not only that, in this folding screen, the gold leaf part is transformed into a dense space with infinite depth. In other words, this gold leaf has a clear reason for existence as a proof of the expression consciousness of drawing a demon god that appeared in the infinite space, beyond being a mere decoration. This is why it is called a masterpiece.