Nihonmatsu Castle, located in Nihonmatsu City, Fukushima Prefecture, Japan, was originally built in the late 16th century. It served as a strategic military stronghold during the Sengoku period and was the residence of the Nishio clan. The castle features a unique layout with stone walls and moats, reflecting traditional Japanese castle architecture. Today, the site is a popular tourist destination, offering scenic views of the surrounding area. Although much of the original structure has been lost, the castle ruins and reconstructed buildings provide insight into Japan's feudal history. Visitors can explore the castle grounds and enjoy the beautiful cherry blossoms in spring.