Kaminokuni, Japan offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Kaminokuni is known for its historical sites, including the ruins of Katsuyama Castle and the scenic beauty of its coastal landscapes. The best time to travel to Kaminokuni, Japan, is in August when the average air temperature is around 22°C (72°F) and the water temperature is approximately 20°C (68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!