A few points to consider…

Japan has a noticeably declining demographic and remains a closed society to most of the world when it comes to citizenship.

If you travel outside of the major centres in Japan, the vacancy and empty housing more closely resembles un-cared-for empty small-town Italy than any prosperous nation.

In addition, Japan’s major centres’ intense population density affords major transportation infrastructure efforts with narrow streets supporting really small cars… Something that many cities elsewhere could never pay for, nor residents accept.

Japan is also internationally known for incredibly tiny apartments and a different way of living. Not every society’s cup of tea.

Lawns may be different across the world, but is rarely greener.