Amami, Japan offers 9 beaches perfect for sunbathing, surfing, swimming, and more. Amami, Kyushu, Japan, is known for its stunning Amami Oshima Island and the Amami Gunto National Park. The best time to travel to Amami, Japan, is from April to June, when the average air temperature is around 22°C (72°F) and the water temperature is approximately 23°C (73°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!