TOKYO ? The dollar eased against the yen in Asian trade Thursday as investors took a breather after the US and Japanese central banks decided to keep interest rates low for now.

The greenback fell to 90.20 yen in Tokyo morning trade from 90.33 yen late Wednesday in New York, where the dollar had recouped an earlier loss from the Federal Reserve's decision to keep the cost of borrowing at historic lows.

The euro fetched $1.3713 compared with $1.3735 in New York, while dropping to 123.75 yen from 124.05 yen.

"Investors for now are stepping aside after a round of key interest rate decisions in Japan and the United States," said Masatsugu Miyata, forex dealer at Hachijuni Bank.

"They are trying to look ahead to what the central banks will do next month while monitoring US economic reports later today, including initial jobless claims," he said.

The Bank of Japan decided Wednesday to double the amount of cash it would make available to banks while keeping key interest rates at a record low 0.1 percent to support a fragile economic recovery.

The US Federal Reserve has also maintained its benchmark rate at virtually zero percent, temporarily sending the euro higher against the greenback.

But the single European currency has remained under pressure amid persistent market concerns over the lack of details from an EU plan to make emergency loans available to Greece, if needed, to shield the country from bankruptcy.

Hachijuni's Miyata warned of the euro possibly losing further ground.

"Concerns for the European debt crisis still linger, keeping the currency top heavy," he said.

"If the euro tumbles, the dollar may test below the 90-yen level against the Japanese unit," a safe-heaven currency when risk appetite recedes, he said.