Tōno Castle, located in Tōno City, Iwate Prefecture, Japan, was originally built in the late 16th century. It served as a strategic fortification during the Sengoku period and was the residence of the Nanbu clan. The castle was constructed on a hill, providing a commanding view of the surrounding area. Today, Tōno Castle exists as a reconstructed site, with its main keep and several other structures. Visitors can explore the castle grounds, which offer scenic views and a glimpse into Japan's feudal history. The site is also known for its beautiful cherry blossoms in spring.