Kumihamacho Minatomiya, Japan offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Kumihamacho Minatomiya is known for its scenic Kumihama Bay and the nearby Kinosaki Onsen. The best time to travel to Kumihamacho Minatomiya, Japan, is in late spring (May), when the average air temperature is around 18°C (64°F) and the water temperature is approximately 17°C (63°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!