Austin is quite visually impaired friendly. The Texas School for the Blind is here and I often see people walking around with canes. You also won't trip over anyone sleeping on the streets, save a couple of places downtown.
I know a bit about Tokyo and while I love the idea, I don't think it's very practical. The language barrier is real. I'm not great at non-computer languages, and Japanese script seems tough to read when one is visually impaired. From what I've seen, living as a foreigner there can be a bit isolating long term.
Currently looking at Europe. But immigration is hard anywhere. And there are tax implications I don't understand well.
Japan is probably one of the most blind/disabled friendly cities I’ve seen. Sometimes there are people sleeping on the floor of the trains too but if you trip over them they’d likely continue sleeping or apologize to you.