Iwabitsu Castle, Mountain fortress in Higashiagatsuma, Japan.
Built at an elevation of 802 meters on Mount Iwabitsu, this stone castle features defensive structures with vertical moats spanning 136 hectares of terrain.
The fortress served as a stronghold for the Sanada clan until 1615, when the Tokugawa shogunate mandated the one-castle-per-province policy, leading to its abandonment.
The castle ruins maintain their status as one of the Continued Top 100 Japanese Castles and represent significant military architecture of medieval Japan.
Visitors can access the castle ruins through the Hirasawa trailhead, with a 15-minute walk to the main bailey after obtaining maps at the tourist information center.
The castle's main bailey measures 140 meters east to west and 35 meters north to south, making it the largest medieval fortification in Joshu province.
Location: Higashiagatsuma
Part of: Continued Top 100 Japanese Castles
GPS coordinates: 36.55915,138.80438
Latest update: May 27, 2025 07:00
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