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Iiyama Castle

Iiyama Castle (飯山城, Iiyama-jō) was a hirayama-style Japanese castle located in what is now part of the city of Iiyama, Nagano prefecture. It was the headquarters for Iiyama Domain under the Edo period Tokugawa Shogunate and its ruins are now a public park.
Type:  hirayama-style Japanese castle
Built:  Year Unknown  

Iiyama Castle  Click to go to Wikipedia