Kamaishi, Japan offers 15 beaches perfect for sunbathing, surfing, swimming, and more. Kamaishi is known for the Kamaishi Daikannon statue and the Hashino Iron Mining and Smelting Site, a UNESCO World Heritage Site. The best time to travel to Kamaishi, Japan, is from late spring to early summer (May to June) when the average air temperature is around 15-20°C (59-68°F) and the average sea temperature is approximately 14-18°C (57-64°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!