Cool! I obviously didn't know that. So that use case is probably quite common in Japan (if the other factors line up, but I don't see why they wouldn't, frequently).
In the US and Europe having your own, dedicated place to put your car is probably more or less weakly coordinated with owning a car (maybe less in the US, where at least in some places owning a car is more of a requirement?). Just because being able to afford a car is probably weakly coordinated with being able to afford your own spot. But this regulation should make that even more so in Japan.
In the US and Europe having your own, dedicated place to put your car is probably more or less weakly coordinated with owning a car (maybe less in the US, where at least in some places owning a car is more of a requirement?). Just because being able to afford a car is probably weakly coordinated with being able to afford your own spot. But this regulation should make that even more so in Japan.