South Korea and Japan will have another round of talks next week on the issue of Korean sex slaves during World War II, the Foreign Ministry announced Friday.

The two sides plan to hold the working-level meeting in Tokyo on Tuesday.

It will mark the 11th session of their formal negotiations, launched in April last year, on Japan's sexual enslavement of hundreds of thousands of Korean women for its frontline troops during the war.

South Korea is demanding a formal apology from Japan for the atrocity and reparation for the victims who are widely called "comfort women."

Japan claims that its legal responsibility has already been settled in a 1965 deal to normalize diplomatic ties with Seoul.

President Park Geun-hye has called for a resolution to the dispute by the end of this year.

In next week's talks, South Korea will be represented by Lee Sang-deok, director-general of the South Korean Foreign Ministry's Northeast Asian bureau. His counterpart will be Kimihiro Ishikane, who heads the Japanese foreign ministry's Asian and Oceanian affairs bureau.

Lee and Ishikane met in November in Seoul for the previous session. (Yonhap)