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.
October is one of the best month to travel Japan. Not too hot, not too cold. Average temperature in Tokyo is 17 celcious degree. October is not a busy season but if you travel from October 6th to 8th, it's better to book hotels/trains early. This is 3-day holidays in Japan and many people go out for vacation.