1) I’d expect more than 10% of currently-living Japanese citizens will be dead in 20 years. 2) But the total population probably won’t drop that much in 20 yea

1) I’d expect more than 10% of currently-living Japanese citizens will be dead in 20 years. 2) But the total population probably won’t drop that much in 20 years, because the birth rate, though low, is rather above zero.