Tatsuno, Japan offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Tatsuno is known for the Tatsuno Castle and the annual Tatsuno Soy Sauce Festival. The best time to travel to Tatsuno, Japan, is in April when the average air temperature is around 15°C (59°F) and the water temperature is approximately 14°C (57°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!