Tonaki, Japan offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Tonaki, Kyushu, Japan, is known for its traditional Ryukyu culture and the Tonaki Island Village, which offers a glimpse into Okinawa's historical lifestyle. The best time to travel to Tonaki, 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!