Onjuku, Japan offers 8 beaches perfect for sunbathing, surfing, swimming, and more. Onjuku is known for its beautiful Onjuku Beach and the iconic "Tsuki no Sabaku" (Desert of the Moon) statue. The best time to travel to Onjuku, Japan, is from June to September, with average air temperatures around 25-30°C (77-86°F) and water temperatures ranging from 22-26°C (72-79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!