Okinoshima, Protected island in Kōchi Prefecture, Japan
Okinoshima is an island in Kōchi Prefecture located within Ashizuri-Uwakai National Park, where rocky cliffs line the coast and subtropical plants grow. The island spans several kilometers and combines natural formations with human settlements.
The island gained attention in the 19th century when Nakahama Manjiro experienced a shipwreck here before his rescue and later role as a bridge between Japan and the world. This event connected the remote island to major changes in Japanese history.
The island reveals how people have shaped the land through stone walls and terraced fields built into the hillsides. These structures show a long relationship between the community and the ocean.
Regular boat services connect the island to Katashima Port in Sukumo City, with the journey taking about four to six hours. Plan for changing weather conditions and bring sturdy shoes, as the paths have uneven surfaces and slopes.
The Nanatsu-udo Caves along the shoreline display formations shaped by waves over centuries. These natural chambers offer a rare look at how the ocean has carved the geology at this location.
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