You can see dolphin dancing when you dive underwater.
Got a surprise that I could see Tuna in Ogasawara.
Ogasawara is a World Nature Heritage mostly because its diversity of species both on land and in water, especially in
Special climate, special geography location make Hahajima a diving paradise.
Although 1000 km away from Tokyo Hahajima still belongs to Tokyo and it is the only one World Nature Heritage of Tokyo.