'Comfort women' - a painful legacy for Tokyo and Seoul

The issue of "comfort women" - a euphemism for those forced to work in Japanese wartime military brothels - has long plagued Japan-South Korea ties.

Few remain

Tens of thousands of women - some say as many as 200,000 - from around Asia, were sent to military brothels to service Japanese soldiers.
Many were Korean. Others were from mainland China, the Philippines, Indonesia and Taiwan.
Only 46 survivors are thought to remain in South Korea. Most are in their late 80s or early 90s.

Arguing terminology - Mariko Oi, BBC News

One of the main debates in Japan about "comfort women" has been whether or not they should be called "sex slaves". Some argue that they chose to work for the Japanese army, lured by high salaries, citing a job advertisement from the 1930s.