Everyone's got an address in the world-wide plus-code system, and they're used for deliveries in many countries: maps.google.com/pluscodes/
If you live in a high rise apartment, a plus code does not identify you precisely. Sadly to do this you need some knowledge of a structure's internals. It makes sense it's being done on the national level in Japan.
For example, a duplex where the front door of each unit is adjacent to the other. Even at the 4m resolution, that means both units front doors (and thus street addresses) can fall into one single pluscode.
Locating a person or business from that entrance is a separate concern. Which must not involve 3D or indoor maps.
>Locating a person or business from that entrance is a separate concern. Which must not involve 3D or indoor maps.
No, it isn't. If it were a separate concern what would be the point of encoding the address in the first place?
Debatable considering it's based on lat/lon only.
> used for deliveries in many countries
Source? Their own website only lists 3 use cases, and only one is used for mail delivery, and even that is in Kolkata only.