Sorry but you're brainless. There have been people living on Japan for probably 100,000+ years and so the population just grew naturally. They didn't know about fault lines then I assume. It was hardly as if someone bought Japan as a real-estate deal and got conned, ie the realtor kept quiet about the fault lines etc. As for blaming God for natural disasters, grow up.
The Earth/land in the high risk Earthquake zone had to crack or move some day. 100,000+ years is more than enough support provided by the Japan land. In has been proven by Science that massive land mass break and move away. If I am correct millions or billions of years ago there was only one world land (Asia, Africa, America etc). Later they broke away into many continents. Earth land changes and many lands disappear. Earlier where there was land, now there is sea and where there was sea now there is land.