I have seen a You Tube video of a so-called Christian saying that God was judging Japan by virtue of the earthquke, tidal-wave and now the radiation. I don’t think so. We live on a fallen planet, and “all creation waits for redemption” (as the Bible says). The “rain falls on the just and unjust alike”.
What the Japanese people are going through are very trying times, and ever single Christian should step up to the plate and do what Christians are supposed to do : help – including prayers, donations, etc.