Just like how Japan isn’t characterized fully by anime it’s not fully characterized by corporate culture either.
I'm in the process of buying a house here. I have helped other with the process, too.
I think if a bunch of people just go into town and do it together it will be less isolating.
A lot of immigrants leave their home countries not because they love the culture of their new country, but because they found living in their old country unbearable for some reason. Or just for economic reasons.
Not everyone actually wants to integrate into a new culture; many don't. Just look at how many people in the US don't speak English, even though that's obviously the dominant culture.
If you're really good, as I'd hope the people on here are, you can get into a foreign company and get paid… more than the average native.
1. The construction quality of the average Japanese house is absolute garbage. Most likely you will need to demolish it and rebuild from scratch.
2. Outside of the big cities, Japan sucks hard. The average small city or village is just a bunch of big box stores and houses scattered everywhere. Many Japanese people want to move to the big cities just to enjoy proper services and some excitement in their lives. So if you move here I hope that you enjoy staying alone at home, because there is not much else to do.
This sounds much like rural America. Houses scattered everywhere, and a super Walmart.
The big difference I've noticed here in Japan (I live in Tokyo), at least from my window on the train going through rural areas, is that the houses tend to be clustered together much more closely. In rural America, everyone wants many acres of land to themselves, but in rural Japan, the land is usually used for farming and the houses are quite close together in a hamlet.
In my experience, your perception depends heavily on your personal background. The city where I live (Misawa) hosts an American military base, and when talking with them nobody ever complaints about the urban sprawl, I guess it is normal for them.
However, I am from Spain, a country where even small villages are very compact (we prefer to build all the houses together, and keep the farms outside), so for me Japanese villages feel very sparse. Another big difference is that in Spain we value public areas (the third space), and here public spaces range between infrequent and not-existent.