Tokyo seems to have solved this by building houses and transportation right? What's preventing other governments from duplicating this? Politics? If so what was unique about Tokyo?
* housing production in Tokyo is great, but to put this in context today's Japanese housing market essentially happened after the bubble pop in the '90s. Prices from 1991 to 2004 had declined by 64% due to the pop. In that context, deregulation was palatable because people were already underwater and didn't bother as much to fight things that would lower property values. (In fact, it could've raised them.)
https://www.airbnb.com/s/Tokyo--Japan/homes?adults=2&refinem...
Why wouldn't the government crack down on this?
Japanese culture would be my guess.