One of the disgraceful things when traveling abroad is the "ghettoes" where all you see are foreign retirees, ex-pats and other "nomads" where local culture is replaced and a new culture emerges to cater to this new influx in order to extract commercial benefit. So the Spanish Riviera, Thai beaches, Dubai, (also in FL who cater to Spring Break, for example
It's the cultural equivalent to the Strip Mall. In the US and Canada lots of towns have the similar feel because they have the common thread of national and regional chains which mimic national chains. This is something most people lament --but this is what would happen to Japan if they allowed mass migration so supplement their own population targets. It would be a country like many others with nothing distinguishing it apart.