During the 1590s, Japan's unifier, Toyotomi Hideyoshi, made two failed attempts to conquer Korea. During these invasions, Toyotomi's army captured thousands of artisans and bought the back to Japan. In 1598, a Korean potter named Koseki created a kiln at Hirado Nakano. This is the beginning of Hirado Ceramics. However, the clay was not very good, so Korean potter Kosei and his son, Imamura Sannojo, journeyed in search of more suitable clay. They eventually found it in Mikawachi and settle there, constructing a kiln. See "みかわち焼の歴史 History of Mikawachi ware". 三川内陶磁器工業協同組合 (Mikawachi Ceramics Industry Cooperative). Retrieved 2014-07-13.