Yamato-Kōriyama, (Kōriyama-Goldfish), city, Nara ken (prefecture), western Honshu, Japan. It is located 3 miles (5 km) southwest of Nara city. A prehistoric settlement, it became a castle town during the last decade of the 15th century. With the opening of a trunk line of the National Railway, a modern textile factory was established there in 1893. The most important industry of the city has been goldfish breeding, which produces about 60 percent of the goldfish in Japan and has established overseas markets. The city also attracts many tourists to Jiko Temple, which has a ceremonial teahouse and garden. Pop. (2005) 91,672; (2010) 89,023.