The yen lost ground on Friday as G7 finance ministers met to debate European demands for action to propel the Japanese currency higher.
Traders said, however, that US and Japanese opposition was likely to see the G7 powers fail to adopt a common position on the yen's weakness.
The US dollar rose to ?21.71 around 10pm GMT from ?21.04 late in New York on Thursday.
The euro moved up to ?58.28 from ?57.82 on Thursday.
The US currency dropped against the New Taiwan dollar in Taipei on Friday, losing NT$0.039 to close at NT$32.971.
A total of US$757 million changed hands during the day's trading. The US dollar opened at NT$33.010 and fluctuated between NT$32.950 and NT$33.025.
The euro fell to US$1.3003, from US$1.3038 on Thursday.
G7 ministers and central bankers, joined by officials from key economies such as China, convened in Germany on Friday to take stock of the global economy. Disagreement seemed likely over the enfeebled yen.
The yen has fallen by 9 percent against the euro since last April, prompting fears in Europe that eurozone exports will become less competitive, so hurting a nascent economic recovery.
"It is self-evident that we will talk about exchange rates," German Finance Minister Peer Steinbrueck told an opening news conference at the G7 meeting in the city of Essen.
The 13-nation eurozone is pressing for concerted action to drive the Japanese currency higher, but the United States and Japan do not see the yen's exchange rate as a problem.
"The market thinking is that while the yen will be discussed at the G7 meeting, it will be difficult to get a consensus opinion, and so no action will be taken," said Ian Stannard, currency strategist at BNP Paribas.
Both Washington and Tokyo have suggested the Japanese currency is fairly valued by competitive markets as the world's second-largest economy is still struggling to shake off deflation.
Japanese Finance Minister Koji Omi has said that foreign exchange rates "should reflect fundamentals" of each economy, reflecting the government's view that Japan's economic recovery remains fragile.
The yen has fallen to a four-year low point against the dollar and an all-time nadir versus the euro since the Bank of Japan decided to leave its super-low interest rates on hold at 0.25 percent last month.
Commonwealth Bank of Australian senior currency strategist Richard Grace said the dollar would continue to find support over the next six months because US interest rates will remain higher than those in the eurozone and Japan.
The pound bought US$1.9493 at 10pm GMT, from US$1.9584 late on Thursday.
The US dollar stood at 1.2475 Swiss francs, from SF1.2459 on Thursday.
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