The Hōjō Residence ruins (Enjō-ji ruins) (北条氏邸跡（円成寺跡), Hōjō-shi-tei (Enjō-ji ato)) is an archaeological site containing the ruins of the late Heian through Kamakura period residence of the Hōjō clan in the Jike neighborhood of the city of Izunokuni, Shizuoka in the Tōkai region of Japan. The site was designated a National Historic Site of Japan in 1996, with the area under protection expanded in 2005