Korea will not attend Japan's memorial ceremony for victims of wartime forced labor at the Sado mine complex for the third consecutive year, the foreign ministry said Wednesday. Japan plans to hold a memorial ceremony for the victims in Sado, Niigata Prefecture, on Saturday, where many Koreans were forced to toil during World War II. Seoul's boycott comes after the two countries again failed to reach an agreement on key issues surrounding the commemoration, such as how to address the coercive nature of the mobilization of Korean workers in the memorial ceremony. "We had continued serious consultations with Japan to ensure that this year's ceremony could be held in a complete and proper manner, but decided not to attend after the two sides failed to reach an agreement on key points," the ministry said in a release sent to reporters. It also urged Japan to "fully and faithfully implement" the recommendations set out in a decision adopted by the 48th session of the World Heritage Committee. Holding an annual memorial ceremony for the mine victims was part of Japan's pledge when the Sado mine