The castle was originally built with deep moats and earthen walls, specifically designed to withstand prolonged sieges using flood-based defenses.
Sanada Masayuki successfully defended the castle against a Tokugawa army of 38,000 soldiers with only 2,000 men during the Battle of Ueda.
The Sanada Shrine within the park is dedicated to the Sanada family, who are revered for their tactical military intelligence.
The park contains a massive 'Sanada Stone' at the castle entrance, which allegedly weighs over 20 tons and was moved into place by the Sanada clan.
The castle’s defensive features included secret escape tunnels, though many have collapsed or been filled in for safety over the centuries.
Ueda Castle Ruins Park is the historical site of the fortress built in 1583 by Sanada Masayuki, famous for twice repelling the Tokugawa shogunate's massive armies. The park grounds feature reconstructed castle gates, earthen ramparts, and stone walls that delineate the original defensive perimeter. Thousands of cherry trees are planted throughout the park, creating a dense canopy during the spring blooming season. Walking paths wind through the remains of the inner and outer moats, providing access to historical markers and the Sanada Shrine. The park serves as a central cultural hub in Ueda, Nagano, preserving the architectural legacy of the Sanada clan. Visitors can view the remaining castle architecture, including the Yagura turrets, which have been partially restored to show their original construction techniques. The site is elevated, offering distinct perspectives of the surrounding mountain ranges and the city below.
The view of the East Gate (Higashi-ko-mon) framed by cherry blossoms from the bridge crossing the moat.
Visit the Ueda City Museum located within the park grounds to view authentic samurai armor and weaponry.
Walk the full perimeter of the outer moat to see the scale of the original defensive embankments.
Check the local bloom forecasts for the cherry blossoms, as peak conditions often last less than a week.
Do not attempt to climb or sit on the historical stone walls, as they are fragile and pose a safety risk.
The park is open year-round, though the Ueda City Museum located on-site observes regular weekly closures.
Stay on marked paths to preserve the earthen ramparts; respect the sanctity of the Sanada Shrine area.
