Kan Onji, Japan offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Kan Onji is known for the Zenigata Sunae, a large sand sculpture of an ancient coin, which is a popular tourist attraction. The best time to travel to Kan Onji, Japan, is in April when the average air temperature is around 15°C (59°F) and the water temperature is approximately 16°C (61°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!