Shimanto, Japan offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Shimanto is known for the Shimanto River, often referred to as the last clear stream of Japan, attracting tourists for its pristine waters and scenic beauty. The best time to travel to Shimanto, Japan, is in May when the average air temperature is around 20°C (68°F) and the water temperature is approximately 18°C (64°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!