OK. I get it. Not precisely dinner table topic. Japan's largest diaper maker already sells more for adults than babies... I am not making this up...It gets worse... See this Huffington Post article if you don't believe me.
The World Bank estimates that fertility rate (births per woman) needs to be around 2.2 to simply "replace" the current population. Any number below means negative growth.
Highly correlated is the issue of age dependency*... Do you have a clue about what any of this means for the future?
All I know is that Japanese workers will have to work a lot harder
*Age dependency ratio is the ratio of dependents--people younger than 15 or older than 64--to the working-age population--those ages 15-64. Data are shown as the proportion of dependents per 100 working-age population.