<national treasure no.107> This is a large jar with a grapevine spreading out its broad leaves drawn on the entire body without additional decorations as if its whole surface were a white canvas. The varying light and shade of the grapevine are expressed in iron paint with free and bold brushstrokes, a reminder of a black and white painting of grapevines. The largesize porcelain completed by joining the upper and lower parts of the jar, produced separately, is not easy to produce due to the difficulty in figuration. In addition, the characteristic of iron paint, a color that is difficult to develop stably, was used to express the light and shade. This white porcelain jar boasts a high level of ceramic technique and pictorial art.