Hachijojima's scuba diving is unsurpassed in Japan. Hachijo is located in a warm current called the "Kuroshio"or "Black Current" running from Indonesia up to Northern Japan. This makes it possible to see the same sea life as in Okinawa, Ogasawara, The Phillipines, and The Marianas islands as well as endemic species of fish. With water temperature highs of 28°C and lows of 17°C it's often warmer in the water during those colder months! Hachijo has many dive points, one of these called "Nazumado" is rated in the top five dive spots in Japan. Both boat and beach dives are available.
Divers should remember that diving and flying on the same day is dangerous and therefore not advised. If swimming or snorkelling be warned the currents are swift!

Sea turtles are common. Many can be viewed feeding close in to the beach. Early birds can catch them still napping in the early morning. A great photo opportunity!