Kosometsuke (Blue and White) （古染付）
Kosometsuke is a dyed porcelain that was burned in a folk kiln in Jingdezhen, Jiangxi, mainly around the end of the Ming dynasty and the Tenkei era (1621-27) in China, and is the name in Japan. Dyed porcelain from folk kilns cannot be said to be of high quality in terms of womb soil and glaze. For example, because the contraction rate of the glaze is different from that of the glaze, the glaze may come off at the bending part of the vessel, exposing the glaze. This is called "Mushikui" because it looks as if it was eaten by an insect. The tea masters of Chanoyu were delighted to find the elegance of nature here and evaluated the taste as an aesthetic effect.