Why No Looting In Japan?

Ed West wonders:

Why do some cultures react to disaster by reverting to everyone for himself, but others – especially the Japanese – display altruism even in adversity?

Easterly uses the lack of looting to explain a development principle:

Economists have been saying for a while that trust is a good candidate to be a major determinant of development. Think how much contract enforcement is critical to make trade and finance possible. Think how much easier contract enforcement is when nobody tries to cheat.