The yen struggled across the board after posting gains this week, weighed by warnings overnight by the Japanese finance minister.
The U.S. dollar fell below 108 yen for the first time in 17 months on Thursday.
The U.S. dollar hit a fresh 17-month trough against the yen on doubts that the BOJ would intervene to halt the yen's appreciation.
The yen soared to its highest in 17 months against the dollar as sentiment in stock and commodity markets soured, with crude oil retreating.
The U.S. dollar hit its lowest against the yen in two weeks on continued expectations of a slow path of Fed rate hikes this year.
The dollar turned higher on Friday after a better-than-expected U.S. nonfarm payrolls report was released.
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The dollar hit its lowest level in more than five months against a basket of currencies on Thursday.
The dollar hit its lowest level against the euro in nearly seven weeks following dovish comments from Fed Chair Janet Yellen.
Dovish words from Fed Chair Janet Yellen on Tuesday have left traders contemplating whether the U.S. dollar will trend lower for the rest of the year.
The U.S. dollar edged lower against a basket of major currencies as traders awaited a speech from Federal Reserve Chair Janet Yellen.
The U.S. dollar eased against a basket of major currencies on Monday after the release of soft U.S. data.
The dollar was on track for a weekly gain of over 1 percent against a basket of currencies after several Fed officials gave hawkish signals.
The dollar climbed for a fifth straight day against a basket of major currencies, on track for its best streak in almost a year.
The dollar rose to a one-week high against a basket of currencies, boosted by hawkish comments by U.S. Federal Reserve officials.
The yen and the Swiss franc rose while the euro fell after explosions in Brussels spurred inflows into safe-haven currencies and assets.
Sterling was the biggest mover on Monday, sinking more than half a percent on concerns a split in the ruling Conservative Party over Europe.
The dollar recovered from a five-month low, as traders covered short positions after two straight days of selling.
The yen was volatile on speculation the Bank of Japan was concerned about the Japanese currency's strength.