Itokazu Castle, Limestone castle ruins in Nanjō, Japan
Itokazu Castle is a limestone castle ruin in Nanjō and the largest fortress structure in southern Okinawa Island. The high stone walls reach about 6 meters in height and demonstrate the impressive structural engineering of this medieval fortification.
The fortress was built during the first half of the 14th century and served as a residence for the local ruler. It remained in use until 1429, making it an important record of medieval power structures in Okinawa.
The site displays traditional Ryukyuan building methods through its limestone masonry work. Visitors can observe how the walls were constructed using local stone techniques that shaped medieval Okinawan architecture.
The ruins can be reached by driving north from the Itokazu intersection on Prefectural Route 48. Sturdy footwear is advisable since the ground is uneven and visitors should watch for the signage marking the site.
The castle grounds contain Neishi Gusuku, a sacred stone structure that served as a ritual base during the fortress's construction period. This stone arrangement is a detail visitors often miss but offers insight into the spiritual practices of medieval Okinawa.
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