Yagi Castle - Credit: Wikimedia Commons
is a late Kamakura period Japanese castle located in the Yōka neighborhood of the city of Yabu, Hyōgo Prefecture, Japan. Its ruins have been protected as a National Historic Site since 1997. The ruins are regarded as historically important, as the site includes the traces of a Kamakura period feudal mansion, Muromachi period mountain castle with clay walls, and the ruins of a Sengoku period castle with stone walls. Read more on Wikipedia
Source: en.wikipedia.org