A Thai woman who spent several months in Japan as a sex slave in the early 2000s said in a recent interview she fears visa-free entry for short-term Thai tourists to Japan could be a double-edged sword.

The woman, who declined to be named, recounted her own ordeal at the hands of human traffickers, adding that making it easier for legitimate tourists to visit Japan might also make it easier for traffickers supplying Thai women to Japan's sex trade.

According to the U.S. Trafficking in Persons report for 2013, Thailand is a regular source, destination and transit country for all genders subject to forced labor and trafficked into the sex trade.