Kumatori brush mediumKumatori brush medium Kumadori brush: Made from a mixture of horsehair and sheep's wool, it is particularly good at absorbing ink and paint. The tip of the brush is bulging like an acorn, and it is used in a wide range of fields other than its original purpose of shading, such as shading in ink paintings and watercolor paintings. Kumadori brush: Made from a mixture of horsehair and sheep's wool, it is particularly good at absorbing ink and paint. The