The Japanese Yen weakened on Friday falling against the U.S. Dollar and the 17-nation bloc currency towards the five-year low as investors' risk appetite increased after Wall Street shares record new highs yesterday and amid favourable economic data in the U.S. The Yen slipped to 105.05 yen before trading at 104.86 yen, while it slid to 143.915 yen, the least since October 2008.