Kotoura, Japan offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Kotoura is known for the Tottori Sand Dunes, a unique natural attraction in Japan. The best time to travel to Kotoura, Japan, is in May when the average air temperature is around 18°C (64°F) and the average water temperature is approximately 17°C (63°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!