Work No.1201 "Spring breeze" Cherry blossoms in Yonbondo Park, Saikai-cho, Nagasaki Prefecture. (On-site sketch) Oil crayon (oil pastel) on handmade Japanese paper The original drawing method, KOOSAIHO, uses nine colors of oil crayon (oil pastel), adding white to the eight colors of the rainbow (the seven colors of the rainbow and red-purple), concentrating on each color of the rainbow that permeates nature, and rubbing each color with the belly of the finger. By rubbing one color on the belly of the finger, layering the colors in a unique order, smashing them with oil, rubbing, and scraping, the artist creates depth in the layering of colors and attempts to approximate the colors of the natural world. Each piece is one-of-a-kind. The impression changes depending on the location (light source) of the viewer due to the layering effect of the rainbow colors.