Posted By:
Pete Z.No disrespect intended, but with Japan's aging population due to low birthrates and increased longevity, I couldn't help but think you meant 30% of Japan's population is under 30. I couldn't find the direct statistic, but looking at the following it's clear there's something awry with your citation:
Age structure
0-14 years: 13.7% (male 8,926,439/female 8,460,629)
15-64 years: 64.7% (male 41,513,061/female 40,894,057)
65 years and over: 21.6% (male 11,643,845/female 15,850,388) (2008 est.)