Okō Castle, Medieval castle site in Nankoku, Japan
The stone walls, moats, and defensive structures of Oko Castle stretch across the 97-meter-high Mount Oko overlooking the Kokyo River valley.
Built between the 13th and 14th centuries, Oko Castle served as the primary fortress of the Chosokabe clan until their surrender to Hideyoshi Toyotomi in 1585.
The Kochi Prefectural Museum of History displays artifacts and documents related to the Chosokabe clan within the castle grounds.
Visitors can obtain detailed castle layout maps at the museum, which help identify the remaining fortifications and historical structures throughout the site.
The castle features multiple vertical moats and trenches, which become more visible during winter when vegetation diminishes.
Location: Nankoku
Part of: Continued Top 100 Japanese Castles
GPS coordinates: 33.59456,133.62212
Latest update: May 12, 2025 17:31
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