The San'yōdō Yamanoumaya site (山陽道野磨駅家跡, San'yōdō Yamanoumaya ato) is an archaeological site with the ruins of a Nara to Heian period government facility located in the town of Kamigōri, Hyōgo Prefecture, in the Kansai region of Japan. The site was designated a National Historic Site in 2006.