Ueda Castle is a historic Japanese castle located in Ueda City, Nagano Prefecture. Originally built in the late 16th century by Sanada Masayuki, it served as a strategic military stronghold during the Sengoku period. The castle features a unique design with a three-story main keep and is surrounded by beautiful gardens and moats. Today, Ueda Castle is a popular tourist destination, known for its scenic views and historical significance. The castle grounds host various events throughout the year, including cherry blossom festivals in spring. Visitors can explore the reconstructed structures and learn about the castle's rich history.