Tarashikomi

A technique involving the pooling of pigments to create distinctive blurred effects. Color is applied with a wet brush and a second color is then applied before the first has dried. The technique most likely originated in Chinese ink painting, but it was developed and made popular in Japan by Sosatsu in the 17th century and continued to be used throughout the 18th and 19th centuries. It was most often seen in Japanese Rimpa-style painting.