First of all, there are innumerable criminal cases that have happened because of the existence of military bases. The U.S. military base problems are not being solved by moving base functions within Okinawa. If another base is constructed, citizens of that area will be exposed to danger. In the sea area around the site proposed for building the base, an international protected animal, the dugong sea mammal is found. There also lives algae which is the Dugong's food.
Turtles are another victim.
Since both dugongs and turtles are very sensitive creatures, they might have to leave their home to look for another place to settle down. Moreover, the site chosen for the off shore base is well known for it's beautiful coral reef. The coral reef plays an important role such as acting as a natural breakwater on the coast and helps to preserve bio-diversity in the area. All life must be protected from the base including animals and plants. Japan presented its written opinion to the Japanese Prime Minister.