Kouda Yaki, also known as Yatsushiro Yaki, is a distinctive ceramic from Kumamoto Prefecture. It began in 1602 when Korean potter Sonkai established a kiln under Lord Hosokawa's patronage. Early works were rustic, using coarse clay with earthy glazes like brown and black. The ware later evolved to use finer clay, perfecting the zogan (inlay) technique for intricate patterns, including white inlay on brown and Taihaku Yaki (black inlay on white). Today, Kouda Yaki is known for elegant colors and refined shapes, influenced by Goryeo celadon with blue-green glazes. Iconic motifs include cloud and crane, alongside Korean-influenced mishima-de and koyomi-de designs. These create highly artistic ceramics, officially designated Yatsushiro Yaki, and recognized as a National Traditional Craft in 2003.