http://www.reuters.com/article/2013/01/25/us-markets-forex-idUSBRE9070IW20130125
The Japanese yen has risen against the dollar...rising beyond options barriers to 90.88 yen/dollar. The ideal is $1.00 = 100 yen (one penny equal one yen). Japan will begin to take countermeasures by dropping prices to encourage more US purchasing of their products...which will put profits dangerously thin...and will impact local wages...which will affect the consumer confidence...which will drag on the economy...and jeopardize what weak recovery they had been making.
They can't afford to let it rise any higher...and their countermeasures will ripple a long, long ways...including here into the USA...not all of them positively.