shot in my garage. would you believe, before the earthquake in 2011, I was building a post-apocalyptic scene in there. now of course, most of the north eastern coast of Japan is ruined. I can't imagine shooting there though, kind of disrespectful to those that lost their lives.
There are a few ruins sites in Japan, but nearly all are closely guarded. the exception being Gunkanjima, but so much permission is needed, and probably bribes to be paid, that I am unsure if it would ultimately be worth it.