The number of Japanese gamblers in South Korea dropped in 2012 due to cheaper yen and other factors according to report

" The number of Japanese gamblers plunged 6.5 percent on-year to 785,000 in 2012, as worries over North Korea's provocations and the cheaper yen drove Japanese visitors away from South Korean betting houses."

Source: Chinese gamblers become No. 1 patrons of S. Korean casinos Yonhap News Agency May 27, 2013 Global Post http://www.globalpost.com/dispatch/news/yonhap-news-agency/130527/chinese-gamblers-become-no-1-patrons-s-korean-casinos