Izena Castle (伊是名城, Izena-jo, Okinawan: Ijina Gushiku) is a Ryūkyūan gusuku on Izena Island. It was built around the 14th century by Samekawa, son of the Yogura Chief of Iheya Island. It is built over a limestone outcrop about 100 metres (330 ft) above sea level on the south eastern side of the island. The castle has three sides which are near vertical cliffs; the south, west and east faces of the castle are rock cliffs, while the northern side provides entry to the castle through a series of steps cut into the hill. There are several chambers in the castle which are separated by walls, built with piled-up pieces of Ryūkyūan limestone, 3 metres (9.8 ft) in height. The chambers have many sacred relics such as utaki (holy enclosures of the Ryūkyūan religion) and also celadons, , and other im