Ink wash painting (Chinese: ; pinyin: shumhu; Japanese: , translit. suiboku-ga; Korean: ), or sumi-e (), [1] is a type of East Asian brush painting that uses black ink – as used in East Asian calligraphy – in different concentrations. Emerging in Tang dynasty China (618–907), it, and associated stylistic features, overturned earlier, more realistic techniques. These associated features include a preference for shades of black over variations in colour, and an emphasis on brushwork and the perceived "spirit" or "essence" of a subject over direct imitation. It flourished in the Song dynasty (960–1279), as well as Japan after it was introduced by Zen Buddhist monks in the 14th century.