Public health is the science of protecting and improving the health of families and communities through promotion of healthy lifestyles, research for disease and injury prevention and detection and control of infectious diseases.
In the spring, southern and western Japan can be quite warm and sunny, from 59 to 77 degrees. Northern Japan ranges from 50 to 68 degrees. Snow remains on the hills into April or May in northern areas. And like Spring in much of the U.S., weather can range significantly from mild, to warm, to cold, on a daily basis.
Eastern Japan has hot and humid summers and cold winters with very heavy snow on the Sea of Japan side and in mountainous areas. Western Japan has very hot and humid summers (with temperatures sometimes reaching 35 oC or above) and moderate cold winters. Okinawa and Amami have a subtropical oceanic climate.