Aizuwakamatsu (Īˈzōwäkämätˈsō) [key], city (1990 pop. 119,080), Fukushima prefecture, N Honshu, Japan. It has a large semiconductor plant and continues to produce many traditional products, including lacquer and ceramic ware, sake, wooden and paper novelties, and decorative candles. Tsuruga Castle, first built in 1384 and rebuilt in 1965, is a major tourist attraction. Its capture by imperial forces in 1868 marked the end of civil war in Honshu.