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Shirahata Castle

Shirahata Castle (白旗城, Shirahata-jō) is the remains of a Muromachi period Japanese castle structure located in the town of Kamigōri, Akō District, Hyōgo Prefecture, Japan.[1] Its ruins have been protected as a National Historic Site as one of the Remains of Akamatsu-shi Castles, combining both Okishio Castle and Kanjōsan Castle, since 1996.[2][3]
Type:  Yamajiro-style castle
Built:  1336  
Builder:  Akamatsu Enshin  

Shirahata Castle  Click to go to Wikipedia