To function in japan your need to speak and understand japanese or else your just goig to be a hermit. (unless your with the military etc...)
Not when you manage to marry a Japanese woman/man who wipes your behind and looks after everything for you from the paperwork through to going to the hospital. I couldn't tell you how many of these knumbskulls like this there are around.
The worst I came across was a man living in Japan for twenty years running an English school. His wife looks after all the administration, all his visa paperwork, and deals with his customers whilst he teaches English.
Couldn't string a sentence together or couldn't even read the drinks menu in the bar in katakana. No word of a lie, he told me that he detroyed his last car when going to the self serve petrol station(he avoids the serviced ones because he can't speak anything) and accidentally put diesel in his car because he couldn't read "premium" in katakana.
And there are no shortage of these people.
I would like to know, being Japanese why on earth would you learn anything from these knuckleheads, as they can't even apply their own teaching/learning methods when it comes to Japanese?
Why would anyone want to live in japan without learning the language? That also does not make sense.
So they can teach English and earn five times the amount they would normally make in their own countries.
Doesn't make any sense to me either.