The purpose of this paper is to clarify the details of how the "Shinden-zu" was drawn. It is possible that Kozen Uramatsu was the author of the "Shinden-zu" and he described it based on some historical materials. These materials also helped the author of the "Tbka-Zasho" complete his work. These materials asserted that it was a drawing of a resident building where Gokyogoku-dono was living in Kamakura period. But in fact, It was the drawing of a mid 17^<th> century residence of the Kujo-family. Kozen carelessly believed it true. It probably happened because there was a historical background that Kujo-family was building a traditional shinden in a Heian revivalistic style during early modern period.