> Also, people in Japan tend to live in multifamily buildings, and private garages can be quite large and serve a lot of cars.

How would you get the driver to reliably go back to the garage to move the car to a non-charging spot after completion? Sharing a parking charger between multiple users requires enormous coordination when usage patterns are not naturally collision free. Without autonomous parking and plugging, the whole concept of charging while parking is effectively creating a 1:1 relationship between chargers and cars

I'm not sure how it works. Many private parking garages here are relatively automated, though——you pull your car into an elevator, get out, walk outside, type in a code, the doors close, and your car disappears up the lift until you need it again. I'm certain that they will eventually work out a system for charging them all, but today the adoption of EV cars is probably not sufficient to warrant it. People are generally pretty ridiculously considerate of others here, so I can see them scheduling charging time and sticking to it.