The U.S. currency also fell against the British pound and the Swiss franc on prospects the credit crisis will hurt growth in the world's largest economy, prompting traders to add to bets on a Federal Reserve interest-rate reduction.
The dollar dropped to $1.3501 per euro at 9:35 a.m. in Tokyo from $1.3456 late in New York yesterday and from $1.3408 on Oct. 10. It traded at 101.60 yen from 101.57 yen yesterday and 100.67 a week ago. Against the euro, the yen was at 137.14 from 136.73.
The U.S. currency weakened to 1.1334 versus the Swiss franc from 1.1379 and declined to $1.7348 against the British pound from $1.7304.
The dollar headed for weekly losses against 9 of the 16 most-active currencies as U.S. housing starts declined to an annual rate of 870,000 homes in September, the fewest since January 1991, from 895,000 in August, according to a Bloomberg News survey of economists. The Commerce Department will issue the report at 8:30 a.m. in Washington.