The U.S. Dollar gained against the Japanese yen on Monday because stocks in the U.S. recouped some losses even though renewed concerns that some financial institutions will be compelled to write down additional mortgage related assets. However, the U.S. Dollar eased versus the Euro as concerns over the decline in crude oil prices waned and the unexpected decline in the Euro-zone investor morale. The Japanese Yen closed at 107.18, down .3% in late New York trading, and the Euro closed at $1.5720, up .1% in late New York trading.