15%: The yen's drop so far against the dollar, from mid-September to 87.8. Top executives like Nissan CEO Carlos Ghosn ... want to see the yen fall to 100 per dollar to make their goods cheaper abroad. That's another 10% dip. Japan exports around $800 billion worth of goods each year, trailing only China, Germany and the United States. The yen last touched 100 in April 2009 in the aftermath of a global financial crisis.