Object description

Ogasawara clan castle sites were a number Sengoku period yamashiro-style Japanese castles located in what is now part of the city of Matsumoto, Nagano prefecture. These fortifications were built in the Muromachi period by the Ogasawara clan, who ruled the area at the time. Two of the sites, that of Igawa Castle and Hayashi Castle have been protected by the central government collectively as a National Historic Sites since 2017.