Kanjōsan Castle, Medieval mountain fortress in Aioi, Japan
The stone walls of Kanjosan Castle extend along narrow terraces at 250 meters elevation, with a central area measuring 40 meters by 20 meters.
The Uryu clan established the castle during the Kamakura period, which later became a strategic stronghold for the Akamatsu clan in their resistance against imperial forces.
The name Kanjosan reflects the recognition given to the Akamatsu clan for their military achievements, as it translates to 'mountain of citation' in Japanese.
Visitors can reach the castle ruins through hiking trails, with access requiring a 20-minute drive from nearby expressway interchanges or public transportation.
The fortress withstood a 50-day siege by Nitta Yoshisada's forces during the political upheaval of the 14th century.
Location: Aioi
GPS coordinates: 34.88131,134.45139
Latest update: March 7, 2025 23:03
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