I could see where living there would be super stressful as far getting lost and having a hard time communicating. The JR system would confuse the ever loving crap out of me. Lucky for me I had a translator with me at all times, the mother of the family I stayed with taught English at Nagoya University. As far as picking up any Nihongo, I learned just simple stuff such as "Lets Eat" "Hello" "Bye" "Sorry" "Thank you & thank you very much" "How Much" & "Where is the bathroom". If I did not have a translator I probably would have been forced to pick up more. Although there was surprisingly more things written in english than I would have thought.