Nationally designated Important Cultural Property
The birthplace of King Eiso, who was born in a royal lineage that prospered in the ancient Ryukyus. There remains a legend that this gusuku (castle) was built by Amamikyu, a goddess who appears in Ryukyu Kaibyaku Shinwa (Ryukyu creation mythology). The Omoro Soshi, a collection of ancient Ryukyuan poems and songs, contains an omoro (ancient poem) that says that Eiso used to engage in sake drinking sprees during the summer and winter, and there is an Omoro stone monument at the foot of Iso Gusuku.
National place of scenic beauty / Prefectural designated historic site