The Bank of Japan is suspected of having intervened in the FX markets to devlaue the Yen. The USDJPY pair has moved from 75.60 to 78.25 for now.
Of course, if the yen stays where it is they will be importing stuff from the US and that's not cool for ethnocentric folk..
AZUMI SAYS JAPAN INTERVENED IN THE CURRENCY MARKET AZUMI SAYS YEN DOESN'T REFLECT FUNDAMENTALS AT ALL INTERVENTION WAS DUE TO STRONG SIGNS OF SPECULATION AZUMI: JAPAN WILL CONTINUE TO INTERVENE UNTIL HE'S SATISFIED http://twitter.com/#!/zerohedge