The U.S. dollar dropped to the upper 109 yen zone Wednesday in Tokyo ahead of the expected release of some key economic data of the United States.

At 5 p.m. local time, the dollar was quoted at 109.94-95 yen compared with 110.13-23 yen in New York and 109.54-56 yen in Tokyo at 5 p.m. Tuesday. The dollar moved up and down between 109.92 yen and 110.29 yen during the day.

The euro fetched 1.1984-1985 dollars and 131.76-80 yen against 1.1962-1972 dollars and 131.78-88 yen in New York and 1.1973-1975 dollars and 131.16-20 yen in Tokyo late Tuesday afternoon.

The U.S. is expected to release some key economic data later this week, including Thursday's consumer price index and Friday's retail sales, both for August.