The other side of Kanchu-keizu features shihai monjo (an old document which was written on the other side of a piece of used paper) depicts augury based on the weather and the shape of clouds, which is considered to date back to the Momoyama period.
その紙背文書には桃山時代に遡ると推定される天候や雲の形による卜占を図示したものが画かれている。