Kasugayama Castle (春日山城) is one of the Uesugi's known castles built in Echigo. Kenshin inherited it as a part of his Nagao family heritage and used it as his main dwelling. The Uesugi Manor, the office and residence of the Echigo-Uesugi Governor Norimasa Uesugi, once stood near the base of the castle. Koei's adaptations of the conflict mainly center the siege of Kasugayama Castle.