Nagannu Island (ナガンヌ島) is one of Keiseshima Islands located in Okinawa. It is about 20 min. from Tomari Port. The entire island is only 0.29k square meters wide made from coral of the Atoll. It has a great blue beach and coral sea.
Tourist Info.
There is ship at Tomari Port.
Access
0. at Naha Bus Terminal
1. use local bus 99 or 120 to Tomaritakahashi.
2. walk
30 min
New Wave Samurai Movie. 
映画好き集まれ！ 
Nagannu Island is an Atoll Island located 20 min. from Okinawa Main Island. It is very small island with beautiful blue ocean and white sea. This is land is made from corals and you can enjoy all kinds of Marine Sports.
Don't take out any corals from this island.