Kamijima, Japan offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Kamijima is known for its scenic Seto Inland Sea views and the Shimanami Kaido cycling route. The best time to travel to Kamijima, Japan, is from April to June, when the average air temperature is around 15-25°C (59-77°F) and the water temperature is approximately 16-22°C (61-72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!