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Noshima is the ruins of a sea castle that remains on Noshima and Taisakijima, two uninhabited islands with a circumference of approximately 720 meters located between Oshima and Hakatajima in Ehime Prefecture.
GoogleMap → https://maps.app.goo.gl/URXqZeooG7TXa... 🟦 SDGs14 Life below water🐟
The castle is said to have been built in 1419 as the stronghold of the Noshima Murakami pirates, who were powerful in the Seto Inland Sea, and is designated as a national historic site.
You can experience the strong currents that once functioned as a natural outer moat through the ``tidal current experience.''