South Korean currency declined on Tuesday slipping to the weakest level in eight weeks as commodities increased snapping a five-day drop as natural gas rose due to raising demand on cold weather in the U.S. The Won shed 0.3% to 1,070.72 a U.S. Dollar as of 2:45 p.m. Tokyo time, while the S&P GSCI Index jumped 0.3% as natural gas added 0.7%.