Amakusa, Japan offers 12 beaches perfect for sunbathing, surfing, swimming, and more. Amakusa, Kyushu, Japan, is known for the Amakusa Gokyo bridges and the Amakusa Christian Museum. The best time to travel to Amakusa, Japan, is in late spring (May), when the average air temperature is around 20°C (68°F) and the water temperature is approximately 19°C (66°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!