By Tatsuo Ito 
 

The dollar softened against the yen in Asia on Monday as overseas players locked in profits after its recent rapid rise to fresh six-year highs.

The greenback hit Y109.46 last week, its highest since August 2008, as investors bet a stronger U.S. economy would eventually prompt the Federal Reserve to raise interest rates. A wider difference in interest rates between the U.S. and Japan typically strengthens the dollar against the yen.

Still, sensing that the dollar's jump by about 5% from earlier this month may have been too abrupt, some investors started reducing their dollar long positions amid a lack of fresh cues, traders said.

At 0450 GMT, the dollar was at Y108.79 compared with Y108.90 late Friday. In early Asia trade, it rose as high as Y109.16 due in part to solid bids related to half-year book-closing trades by Japanese firms ahead of the end of September.

"The dollar's upturn against the yen won't change, given there were no complaints about the yen's decline at the weekend's G20 meeting and that U.S. Treasury Secretary (Jack) Lew has supported a strong dollar," said Yuji Saito, executive director of foreign exchange at Crédit Agricole Corporate & Investment Bank.

The Group of 20 industrial and developing nations agreed on Saturday in Australia to aim for higher global growth over the next five years via a wide-reaching package of structural measures, but made little mention of policies affecting currencies and exchange rates.

Mr. Saito said the dollar appears set to test the next technical target of Y112.62 in the medium term.

Before that, however, "it won't be surprising to see the dollar falling by Y2 to Y3" as hedge funds have excessively built up long positions betting on a rise in the dollar, Mr. Saito added.

With major economic indicators thin on the ground this week, he said the market may focus on a slew of speeches by U.S. Federal Reserve officials, including New York Fed President William Dudley and Chicago Fed chief Charles Evans, later this week.

Toshihiko Sakai, senior manager in the forex and financial products trading division at Mitsubishi UFJ Trust and Banking, said a further advance in the dollar may be difficult since "it's coming close to Y110," which he and others consider a likely near-term high.

Of more concern for Mr. Sakai is how the U.S. stock market will fare ahead of U.S. midterm congressional elections later this year.

"If the U.S. stock market loses ground, that could raise questions about the dollar's strength," he said.

The euro was at $1.2860 from $1.2837. The WSJ Dollar Index, a measure of the dollar against a basket of major currencies, was down 0.25% at 76.72.

 
Interbank Foreign Exchange Rates At 00:50 EST / 0450 GMT 
 
                         Latest         Previous  %Chg    Daily     Daily   %Chg 
                                        2150 GMT           High     Low    12/31 
Dollar Rates 
USD/JPY Japan           108.75-76      108.98-09  -0.23   109.18   108.68  +3.27 
EUR/USD Euro            1.2860-62      1.2832-37  +0.20   1.2868   1.2828  -6.43 
GBP/USD U.K.            1.6349-52      1.6302-09  +0.27   1.6364   1.6290  -1.25 
USD/CHF Switzerland     0.9384-88      0.9403-11  -0.22   0.9411   0.9380  +5.11 
USD/CAD Canada          1.0932-36      1.0965-74  -0.32   1.0966   1.0928  +2.94 
AUD/USD Australia       0.8935-38      0.8929-34  +0.05   0.8949   0.8924  +0.24 
NZD/USD New Zealand     0.8158-62      0.8147-54  +0.12   0.8169   0.8138  -0.75 
 
Source: ICAP PLC 
 

Write to Tatsuo Ito at tatsuo.ito@wsj.com