Why JPY rise for so long?

Can you plz explain for me? Japan is an export country,the largest market is USA,But USA is in crisist now,this mean demand decrease so that total value export of Japan must decrease too--->JPY must be plunged,but it's rise like crazy,some one plz explained for me,I'm a newbie,thank so much

The yen has been strengthening as a result of the end of the carry trade, in which traders borrowed the Japanese currency and used it to buy currencies with higher interest rates.

thank you bro,is this just about carry trade or something else behind that make Yen strengthening?

The yen and dollar rose as investors continued to flush funds out of emerging markets on heightened fears of global recession after a plunge in Asian equities markets, which led U.S. stock index futures to hit limit-down in electronic premarket trading early Friday.

I understand,you mean that the investors pull out money from emerging markets and buy USD and Yen,I knew that USD is a good choice to protect their capital but why they also care about Yen?Japan also have influenced from this crisist,whether Yen have smallest rates? thank so much again bro,any one have another idea plz