Nakijin, Japan offers 7 beaches perfect for sunbathing, surfing, swimming, and more. Nakijin is known for Nakijin Castle Ruins, a UNESCO World Heritage Site. The best time to travel to Nakijin, Japan, is from March to May, with average air temperatures around 20-25°C (68-77°F) and water temperatures around 21-24°C (70-75°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!