Japan is a country have the most proportion of the elderly in the world. Japan is the first country of towards a seniors society since 2513 (there are population 65 years of age is more than 7%) and elderly society has become completely in 2537 (there is population 65 years of age is more over 14%) and in the present, approximately 23% of the aged population are more than 65 years old, which is considered the ultimate high in society (there is the population in 65 years of age more than 20% ).In 2563 , likely to be increasing by a projected the country will have Japan population aged up to 29% and 39% a year,In 2593 Japan become elderly society quickly. Because of the low rate of new-born children have a long time.