Adaga Island

安田ヶ島

An uninhabited island in Yanbaru National Park surrounded by coral reefs, marking the boundary between two major seas.

What it is

An uninhabited island located 500 meters offshore from the Ada district in Kunigami.
A designated part of Yanbaru National Park since 2016.
A former place of worship used by locals until the Meiji era.
The site where a Korean ship drifted in 1794 and Perry's fleet visited in 1853.

Coral reefs known as Harasaki and Ibuhishi surrounding the island.
Bedrock formations consisting mainly of Paleogene sandstone from the Kayo Formation.
The boundary where the Pacific Ocean meets the East China Sea.
A lighthouse established on the main island side across from the shore.

Notes written by Japan Gems from facts in Japanese Wikipedia.