I have calculated several population problem of Japan before.
So I come to feel sensitive about the world and number of "birth rate".
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"Birth rate" is the average of numbers of children, being born from the women from fifteen years old to forty-nine.
Needless to say, less than the value of "2.0", the population of the nation cannot be kept.
By the way, the birth rate of Japan for this twenty years is about 1.4, and now the society with fewer children has been in progress dynamically.
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I think that "birth rate is a sort of report card of the nation from the citizen.
Except for the countries where the citizen think a child is a labor, and the death rate of children is extremely high, "birth rate" assumes "expected value of happiness"
For example,
For the nation that have citizens who cannot feel happy to bear and rear a child, the birth rate is going down.
For the nation that have citizens who don't think that their child will be happy, the birth rate is going down.
So it is an "expected value"
Both Japan and the neighboring country in peninsula, are the worst birth rate countries in the world.
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Last weekend, I read "the birth rate in Korea is going less than "1.0" in the newspaper.
I was really shocked to read the article.
I have tried to the population simulation under condition of "the birth rate less 1.0" before, and I remember that the result made me pale.
In order to overcome the aging of its population and the declining birth rate, we need a long time(more than several ten years). If not a certain amount of population, the effect will be not expected.
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Now the government is going to hammer out laws, more favorable terms, welfare work and so on. and aiming the birth rate of "1.8".
The target is clear.
It is "temporization".
The strategy is to be expected to arrive the breakthrough reproductive technology in the future.
I think that this is a only strategy that we can handle at the present.
However, the condition of the strategy is based on the present birth rate of "1.4".
(To be continued)