Akashi, Japan offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Akashi is known for the Akashi Kaikyo Bridge, the longest suspension bridge in the world. The best time to travel to Akashi, Japan, is in April when the average air temperature is around 15°C (59°F) and the average water temperature is about 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!