Ōzato Castle, Medieval fortress in Nanjō, Japan
Ōzato Castle is a medieval fortress in Nanjō built with limestone walls characteristic of the Ryukyu Islands and wooden structures within its perimeter. The ruins sit on elevated ground and display the distinctive architectural style of these regional defensive structures.
The fortress was a primary stronghold from the early 14th century until 1429, when it fell after nearby Nanzan Castle was captured. This defeat marked the end of an important power period in the region.
The site shows how people once held ceremonies and managed daily affairs in one place. The remains reveal that these fortresses were more than just military structures - they were centers where local leaders conducted rituals and administrative duties together.
The castle ruins are open to visitors year-round and accessible through marked trails that wind through different sections. Sturdy footwear is recommended due to the elevated terrain and uneven ground surfaces throughout the site.
Excavations at the castle grounds uncovered ceramics from the Ming Dynasty, revealing direct trade connections to China. These discoveries show that the region was part of a larger commercial network stretching across the sea.
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