I don't know, I'm not sure that the international reaction is any worse than for other natural disasters. I read an article saying that the donations so far are a lot less than for Haiti. But as you say, it's a wealthy country, so donations of money (while important) are perhaps not as appropriate as drinking water, food, blankets, search/rescue teams, medicines and medical care, fuel, etc. It's good to see China helping out Japan too, despite the fact that they don't exactly get along (to put it mildly). Also bear in mind that it takes a while to mobilise these things.