According to 2000 ‘s report, Japan has became one of the most country which has the highest proportion of population aging and owing to this reason, Japan‘s GDP has dropped 10%-16% compared to the previous years. This has drawn awareness of the increasing in average life expectancy in many country include Japan itself and turn into very difficult hassel. We are living in 4.0 century when industry also medical treatment have greatly improved, with these favourable conditions, people can expect to live longer than before. However, it also causes negative consequences and governments should hit upon the solution in order to deal with.