IMHO, I consider japan as in the middle tier in terms of peace. I find the word peace in connection with not just the people, but with the nature too.
It's not as buffeted by cyclones as the Philippines though. It's mostly the tsunamis to watch out for, they have very strict building code and many of their buildings are sturdy enough to withstand quakes.
Other than that, the peace and order is high than most other Asian countries. Of course if you're a foreigner wanting to move and live there then you might have some trouble.