Kashiwazaki, Japan offers 14 beaches perfect for sunbathing, surfing, swimming, and more. Kashiwazaki is known for the Kashiwazaki-Kariwa Nuclear Power Plant and the beautiful beaches along the Sea of Japan. The best time to travel to Kashiwazaki, Japan, is from late spring to early summer (May to June) when the average air temperature is around 18-22°C (64-72°F) and the water temperature is approximately 16-20°C (61-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!