This island is located at the southern tip of Tateyama Bay and is one of Minamiboso Quasi-National Park.
Rocky and sandy beaches are mixed on the small island, which is about 1 km around, and you can enjoy fishing. Shimauchi is a nature island where coastal flora and fauna coexist.
From snorkeling that even beginners can enjoy, observation of corals in the northernmost region of the world, guided tours that fully learned about the Jomon Kainaka ruins about 8,000 years ago, various experience menus based on the island, and how to enjoy Okinoshima are diverse.
In Tateyama Bay, where the waves are calm and quiet, you can see Mount Fuji and Sagami Mountains beyond the flat waves from the coast, and especially the sunset overlooking Mount Fuji is particularly superb.