Sanada Castle is a historic Japanese castle located in Nagano Prefecture. Built in the late 16th century by the Sanada clan, it served as a strategic military stronghold during the Sengoku period. The castle is known for its unique architecture and beautiful natural surroundings. Today, Sanada Castle is a popular tourist destination, featuring reconstructed buildings and informative displays about its history. Visitors can explore the castle grounds, which include a museum that showcases artifacts related to the Sanada clan and the castle's role in Japanese history.