The dollar rose against the euro Thursday as investors pushed back into the greenback and sent US bond yields lower.
Japan will pledge $20 billion in aid to Southeast Asian countries at a 11-nation summit this weekend as it looks to shore-up ties in a region increasingly dominated by China, reports said Friday.
The dollar eased in Asia Tuesday amid uncertainty about the Federal Reserve's plans for its huge stimulus programme.
The yen strengthened slightly in Asian trading on Tuesday after a US Treasury official praised Japan's recent moves to boost the economy as Tokyo faces claims it is manipulating the currency's slide.
Toyota shares on Tuesday jumped to their highest level this year, boosted by a weaker yen and after a report said the firm was on track to be the world's biggest automaker in 2012.
The dollar and euro climbed against the yen in Asia on Thursday as positive Chinese manufacturing data boosted risk sentiment, while traders were also looking ahead to a crucial US jobs report.
The euro inched higher in Asian trade on Wednesday after hitting new multi-year lows against the dollar and yen amid worries over the European debt crisis.
The euro tumbled below 95 yen for the first time in almost 12 years on Monday as dealers rushed to the safe-haven Japanese unit owing to growing fears about Spain's debt crisis.