Maybe you mean suburban sprawl? Or maybe you just mean the urban area is less disjointed? Urban sprawl is exactly how I would characterize Japan, but maybe I just have the terminology wrong. It's actually one of the reasons I suspect such dense cities work so well, as the mixed zoning creates self serving blocks of commerce and residential. Like you've pointed out, it could actually make remote work a very vibrant lifestyle, full of coffee shops, cafes, regular faces and casual conversation.
If I had to work remotely for the rest of my life, I'd choose Japan, so that I could walk out my front door and around the corner to pretty much anything I'll ever need. I can't do that in the suburbs, pretty much anything useful is a car journey away. I worked remotely from the suburbs for about 4 years, and it was incredibly isolating. There was no-where to go that fit into even an hour long break.