1. Space is limited, but always has been. Housing at the scale and quality expected in Japan is still very affordable and isn’t correlated with birthrate. This

1. Space is limited, but always has been. Housing at the scale and quality expected in Japan is still very affordable and isn’t correlated with birthrate. This one is easy to disprove. 2. The reasons you listed are completely different from the one I responded to, and these are certainly potential factors. At least they’re often considered reasonable suspects in Japan.