Kojima, Desert island in Hokkaido, Japan.
Kojima is an uninhabited island near Matsumae in Hokkaido, featuring a small harbor and surrounding islets with a peak reaching about 280 meters. The landscape is shaped by coastal cliffs and natural rocky formations that frame the shoreline.
The island served as a navigation landmark for maritime travelers crossing the Sea of Japan over many centuries. Its position at Hokkaido's southernmost region made it a recognized reference point for ships passing through these waters.
Local fishermen from Matsumae maintain traditional fishing practices in the waters around Kojima, known historically as the Sea of Treasure.
Reaching the island requires advance planning since there are no permanent facilities on site. Sea conditions change frequently, so checking maritime schedules before traveling is essential for a successful visit.
The surrounding waters contain the Ko Island Bank, located 15 kilometers west, which draws large populations of migratory fish species.
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