The euro fell 0.3 percent to 100.99 yen, its lowest level since Oct. 11 with traders saying stop loss sell orders were triggered below 101.00 yen.
The dollar was also weaker against the yen, trading 0.2 percent lower on the day at 79.29 yen, its lowest in more than a week.
The safe-haven yen is generally sought after during times of financial stress and uncertainty about a global economic recovery.
