Ink wash painting

Ink wash painting, also known as literati painting is an East Asian type of brush painting that uses black ink—the same as used in East Asian calligraphy, in various concentrations. For centuries, this most prestigious form of Chinese art was practiced by highly educated scholar gentlemen or literati.

Names used in the cultures concerned include: in Chinese shuǐ mò huà (水墨畫), in Japanese sumi-e (墨絵) or suibokuga (水墨画), in Korean sumukhwa (수묵화), and in Vietnamese tranh thủy mặc (幀水墨).

https://en.wikipedia.org/wiki/Ink_wash_painting