Paulownia wood board, black gesso, and others used. Washi paper is not used. It is painted directly on the panel. Backing is aluminum foil with mizuhoshi and silver ink. This work is an expression of enlightenment, truth, buddhahood, the entire universe, and peace of mind, as seen in Zen paintings from ancient times. This work is backed by thick black lines. Nihonga" is based on a style of painting that has existed for more than 1,000 years, and uses traditional materials that have been cultivated through the ages. The technique involves painting on Japanese paper, silk, wood, etc., using natural pigments such as sumi ink, iwa-enogu (mineral pigments), and gofun (gofun), and glue as an adhesive. Gold and other metal materials (gold leaf, etc.) are also used. Iwa-enogu, made from ores, is a beautiful, sand-like powder. Mizuhigure, made from clay, is a fine, stretchy paint with fine particles. Artificial versions of iwa-enogu and mizuhoshi egur are also made, and are available in a wide variety of colors. Goko, made from shells, is a white pigment with fine particles.