It's not just matching
Several posters have stumbled on the answer, but each has one part of the puzzle.
Japan's birthrate is low due to basically three major factors: long works hours without paid overtime, wages not keeping up with inflation and lack of job security.
All of the things that were present and were taken for granted in 1970-1990s Japan until their Great Recession and are now gone.
Without stability, who in their right mind has children?
All other reasons basically revolve around those three issues.
Biting the hand that feeds IT
