Nakagusuku Castle (中城城, Nakagusuku jō; Okinawan: Nakagushiku) is a Ryukyuan gusuku fortification located in the village of Kitanakagusuku, Okinawa, Japan. It is known for being the best-preserved of any gusuku ruins, and the six courtyards of this fortress with stacked stone walls make it a prime example of a gusuku. It has been protected by the central government as a National Historic Site since 1972. The designated area is 110,473 square meters, of which 14,473 square meters is the castle grounds. In November 2000, it was registered as a UNESCO World Heritage Site as part of the Gusuku Sites and Related Properties of the Kingdom of Ryukyu, along with the Shuri Castle ruins and others.
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