Work No. 788 "Haru ni naru koe" (Cry in spring), Kanadachi Cosmos Garden, Saga Prefecture, Japan. (Oil crayon (oil pastel) on watercolor paper The original painting 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). By rubbing one color on the belly of his finger, layering the colors in a unique order, smashing them with oil, rubbing, and scraping, he attempts to create depth in the layering of colors and bring them closer to 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.