根本城, Mountain fortress in Tajimi, Japan.
Nemoto Castle is a mountain fortress near Tajimi built at roughly 285 meters elevation with stone walls, earthen banks, dry moats, and defensive ditches spread across multiple fortified areas. The site shows the typical layered structure of a medieval Japanese defensive complex.
The fortress was built in the late 1700s by the Wakao clan, a branch of the Takeda family, as a forward position during their push into the Tono region. The location served as a strategic stronghold for territorial control.
The layout shows how people in the 16th century designed defenses, with walls and trenches arranged to control movement through the site. Visitors can see how terrain and construction worked together to create protection.
The walk from the parking area takes about 15 minutes and is marked with signs explaining different areas. Sturdy footwear is wise since the path crosses uneven ground.
From the main area you can look out over modern Tajimi while standing among original earthwork banks. This contrast between ancient defenses and the modern city below is striking.
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