The purpose of this paper is to discuss the flatness (two-dimensionality) of painting or the creation of such a pictorial dimension by the Japanese painters. The paper examines the material used for painting its physical surface in order to form a certain pictorial world that is in accordance with the Japanese aesthetic sensibility. It also attempts to investigate the process by which such a painting could create and project such sensations of material used on its surface. The paintings after Impressionism eliminated the traditional concept of linear perspective. This new concept of pictorial dimension, or flatness in painting, derived from historical interactions between movements in arts, science, physics, psychology, and philosophy. I th...