Hiji, Japan offers 1 beach perfect for sunbathing, surfing, swimming, and more. Hiji is known for Harmony Land, a Hello Kitty theme park. The best time to travel to Hiji, Japan, is in April when the average air temperature is around 15°C (59°F) and the 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!