Oirase, Japan offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Oirase is known for the Oirase Gorge, a picturesque natural attraction featuring stunning waterfalls and lush forests. The best time to travel to Oirase, Japan, is in late spring (May), when the average air temperature is around 15°C (59°F) and the water temperature is approximately 10°C (50°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!