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Kōriyama Castle (郡山城 Kōriyama-jō) was a Japanese castle in what is now the city of Yamatokōriyama, Nara Prefecture, Japan. The Sengoku daimyō Tsutsui Junkei started construction of the castle, and Toyotomi Hidenaga made it his residence.[1] In the Edo period, it became the headquarters of the Kōriyama Domain. During this time it was held by members of the Mizuno, Okudaira Matsudaira, Honda, Fujii Matsudaira, and Yanagisawa clans.
Today, many walls and moats are preserved in a public park in the city. The Yanagisawa Shrine stands on the grounds.