Urasoe yōdore (mausoleum) built
1261 CE.
Shown on the map at 26.247°, 127.732°.
Urasoe yōdore (浦添ようどれ or 浦添極楽山; Okinawan: Urashī yūduri) is one of the three royal mausoleums of the Ryukyu Kingdom, along with Tamaudun at Shuri Castle and Izena Tamaudun near Izena Castle in Izena, Okinawa. It is located in Urasoe, Okinawa, in a cave on a cliff to the northeast of Urasoe Castle. It houses the remains of three rulers of the Ryukyu Islands, along with one king of the Ryūkyū Kingdom separated from the others by several centuries.
Text from the Wikipedia article Urasoe yōdore, licensed CC BY-SA 4.0.