Nishihara, Japan offers 1 beach perfect for sunbathing, surfing, swimming, and more. Nishihara, Kyushu, Japan, is known for the Kumamoto Castle and the Suizenji Jojuen Garden. The best time to travel to Nishihara, Japan, is in April when the average air temperature is around 20°C (68°F) and the water temperature is approximately 22°C (72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!