The castle was the staging point for Takeda Shingen during the Fourth Battle of Kawanakajima in 1561.
It was renamed Matsushiro Castle in 1711 after the local domain took the same name.
The castle was intentionally set on fire in 1872 during the Meiji Restoration period to prevent its use by rebel forces.
The earthen ramparts, known as 'dobei', were reconstructed using traditional techniques to mimic the original Edo-period walls.
The site was designated a National Historic Site in 1951.
Cherry trees planted within the castle grounds bloom annually, making it a local hub for hanami.
Matsushiro Castle Ruins, formerly known as Kaizu Castle, is a historic site in Nagano originally built in the mid-16th century by Takeda Shingen. The site is notable for the extensive restoration of its earthen ramparts, moats, and two reconstructed wooden gates (the Taiko-mon and North Gate). Unlike many Japanese castles, it lacks a multi-story stone keep, as the main tower was destroyed by fire in the 19th century and never rebuilt. The grounds serve as a public park with designated walking paths through the inner bailey. The castle served as a crucial defensive stronghold for the Sanada clan during the Edo period. Significant masonry and foundation stones remain in their original positions around the perimeter. The site remains a primary example of Edo-period flatland castle architecture. Visitors can walk atop the earthen embankments to view the surrounding landscape.
From the bridge spanning the inner moat looking toward the reconstructed Taiko-mon gate.
Walk the entire perimeter of the inner moat to see the varying angles of the stone foundations.
Visit the nearby Sanada Treasures Museum to see artifacts once held by the local feudal lords.
Wear comfortable footwear suitable for gravel paths and earthen inclines.
Do not expect to see a multi-story castle tower, as the structure is limited to gates and ramparts.
Open daily, though access to specific reconstructed gate interiors may be restricted during winter months.
Stay on marked paths to protect the historical earthworks and do not climb on the stone walls.
