Lol this has to be the worst headline ever. Tokyo is nowhere affordable unless you have a SV salary while living in Japan. Median Japanese salaries are not high and that is precisely why people commute from very far away to go to work in Tokyo.
[1] https://japanpropertycentral.com/real-estate-faq/home-loan-t...
Most places <$1k USD/month seem to be 20-25 sq meters
If you want to have a family you basically can't live in a small cramped apartment in the city. That's why families with kids move out and people commute like crazy.