The Japanese currency declined on Thursday traded near lows against the 17-nation bloc currency and the U.S. Dollar and it recorded the worst monthly performance in 2013 as investors' appetite for low-yielding currencies decreased. The Yen fell 0.3% to 139.15 Yen, traded close to 4-year low at 139.26, while it slipped to 102.20 per U.S. Dollar.