Oyama Castle, Medieval castle in Oyama, Japan
Oyama Castle stands on an elevated plateau along the Omoigawa River, featuring three concentric baileys connected by wooden bridges spanning deep moats.
Built in 1148 by Oyama Masamitsu, the castle served as the primary fortress of the Oyama clan until 1576 when it surrendered to the Hojo family.
The castle grounds contain the Suga Shrine, which functioned as the spiritual center for the Oyama clan and provided the alternate name Gion Castle.
The castle site, now transformed into Shiroyama Park, includes educational displays about local history and maintains clear traces of its fortification system.
Three crescent-shaped moats measuring 7, 9, and 10 meters in width defend the castle, with earthwork embankments present only on the two inner trenches.
GPS coordinates: 36.31933,139.80000
Latest update: May 11, 2025 11:31
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