The dollar fell to a five-month low against the yen on Monday as rising tensions over North Korea stoked demand for the safe-haven Japanese currency.
The U.S. dollar retreated to 108.14 yen, its lowest since mid-November before recovering some ground to trade up 0.01 percent at 108.62 yen.
"We are seeing once again a little bit of a flight to safety as a result of the news over the weekend of North Korea's attempted missile test. That's resulting in a little bit of a weakness in the U.S. dollar," said Omer Esiner, chief market analyst at Commonwealth Foreign Exchange in Washington.
The euro and the pound slid to five-month troughs of 114.87 yen and 135.63 yen, respectively, before reversing course to trade slightly higher against the yen. The euro was last up 0.41 percent at 1.0653 against the dollar and the pound was last up 0.46 percent at 1.2579 against the dollar.