Sefa-utaki (斎場御嶽, Okinawan: シェーファウタキ Seefa-utaki), meaning "purified place of Utaki," is a historical sacred space, overlooking Kudaka Island, that served as one of the key locations of worship in the native religion of the Ryukyuan people for millennia. Later as a part of assimilation of Okinawa by Japan, it was shifted to serve as a Shinto Shrine. It is part of the UNESCO World Heritage Site Gusuku Sites and Related Properties of the Kingdom of Ryukyu in Nanjō, Okinawa.