A Japanese 10,000 yen banknote sits on a pile of South Korean 1,000 won banknotes for a photograph at the Korea Exchange Bank headquarters in Seoul, South Korea, on Thursday, Feb. 13, 2014. The South Korean currency is down about 3.8 percent against the yen this year, following a 23 percent gain in 2013, which aided Japanese exporters. Photographer: SeongJoon Cho/Bloomberg via Getty Images