Hitsuzendō or "the way of Zen through brush" is a form of artistic expression rooted in traditional Japanese brush work. The attainment of "clear mind" comes with a focus on the use of simple forms and concentrated effort. Traditionally sumi ink is painted on various types of rice paper using animal hair brushes.
A common form seen in this style of painting is the ensō, or circle of emptiness. The ensō is a visual representation of Zen Buddhist practice, depicting the split and unification of self and other. When Zen Buddhism came to America in the late 1950's Westerners modified traits of its style with English words to continue the spirit of hitsuzendō in new ways.