 250px|right  is an archipelago in the sea of japan, which are administratively part of oki district, shimane prefecture, japan. the islands have a total area of . only four of the sixteen named islands are permanently inhabited. much of the archipelago is within the borders of daisen-oki national park. due to their geological heritage, the oki islands were designated a geopark within the unesco-assisted global geoparks network in september 2014.http://www.globalgeopark.org/aboutggn/list/japan/8438.htm ==geology== the oki islands are volcanic in origin, and are the exposed eroded summits of two massive stratovolcanoes dating approximately 500 million years ago to the  tertiary and quaternary periods. the oldest rocks in japan have been found on the oki islands. dÅgo to the east is the largest island in area, and has the highest elevation, mount daimanji, at  above sea level. the dÅzen group of islands to the west are all portions o
Archipelagoes_of_Japan Geography_of_Shimane_Prefecture Islands_of_Japan Islands_of_the_Sea_of_Japan Visitor_attractions_in_Shimane_Prefecture