The yen rose sharply against the euro and dollar on Friday after yet another downbeat session for oil prices and stock markets worldwide, underscoring worries about global growth.
The dollar fell overall, with the higher than-expected U.S. inflation data for January having limited impact. Analysts said declining oil and equities took the shine out of the dollar.
U.S. data this week has been generally positive, however, helping the dollar index post its best weekly performance in about two months.
The index was last down 0.32 percent on the day at 96.65.