Detail 
population, rejuvenation of the population younging
人口の若年化   jinkō no jakunenka
Verjüngung der Bevölkerung

Comment

Population Younging: An increase in the proportion of young persons in a population, usually resulting in a fall in the median age.

Links

Glossary
http://www.es.mq.edu.au/courses/GEOS219/glossary.htm
 

Copyright 2012 DIJ