人口減少の原因
１晩婚化
→子供の数が減る
2結婚が減ってる
←若者の所得の減少
←経済が悪い
３東京一極集中
It diminishes the disposable income of young people
because rent in metropolis for example rent in Tokyo is very expensive.
It also causes the decrease of marriage.
In short, the oldness of people who marry, the decrease of marriage because of lower income, and population concentration to metropolis are the major cause of short of child and aging society.
In short, the oldness of people who marry, the decrease in marriage because of lower income, and population concentration in the metropolis are the significant causes of the shortage of children and an aging society.
