Yaese, Japan offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Yaese, Kyushu, Japan, is known for the Yaese Park and the historic Gushikami Castle ruins. The best time to travel to Yaese, Japan, is from April to June, when the average air temperature is around 22°C (72°F) and the water temperature is approximately 23°C (73°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!