Château de Kasugajo, Medieval Japanese castle in Saku County, Japan
The castle complex extends across mountain ridges at 180 meters elevation, featuring earthen ramparts and dry moats on multiple terraced levels.
Nagao clan established this fortress during the Sengoku period, which later served as a military stronghold for the Uesugi clan until 1607.
The castle layout represents traditional yamashiro architecture, with multiple defense layers including kuruwa enclosures and strategic positioning on Mount Kasuga.
Visitors reach the castle site through Hirasaku station on the Koumi Line or Higashi-Komoro Station on the Shinano Railway, requiring a 40-minute exploration.
The fortress maintained its original earth-based fortification system without stone walls, distinguishing it from later Japanese castle constructions.
GPS coordinates: 36.21781,138.35056
Latest update: August 4, 2025 06:27
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