Hachijō-kojima, Volcanic island in Izu archipelago, Japan.
Hachijō-kojima is a volcanic island in the Izu archipelago, located in the Philippine Sea south of mainland Japan. Steep cliffs define the coastline of this landmass, which rises to a summit 616 meters above sea level.
Two settlements existed here until 1969, when residents left due to limited public services and the island's remoteness. During the Edo period authorities used the location as a place of exile, relying on strong ocean currents to prevent escape.
During the Edo period, the strong currents separating Hachijō-kojima from neighboring islands made it an effective location for exiling prisoners.
The terrain consists of rugged volcanic rock with steep inclines, requiring sturdy footwear and caution when walking. The entire coastline measures roughly 8700 meters, and the island itself extends about three kilometers in length.
The Kuroshio Current brings tropical fish species to these northern waters, drawing marine researchers to the area. This warm ocean current creates unusual conditions for a location at this latitude.
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