Astroboy I believe, posted an article from the NY Times saying that Japan will survive relatively unscathed as they have trillions in cash due to the frugal spending habits of the Japanese and their high savings rate unlike the US and perhaps Europe and the UK.
As Japan survived their own bubble crash of the housing markets in the 90's, I believe the economy will survive and continue as it always had. The Japanese have always gotten through times like this and have come out smelling good in the long run. I don't see anything different save that the carry trade is dead in the water for the time being and the Japanese yen will only continue to get stronger as it has dropped below 100/US$ today. In the past month it has dropped about 6 yen. This may hurt their exports in the short term, but they have enough factories overseas to more than make up for it in the long term.