The Sado mines were listed in July as a UNESCO World Heritage site after Japan moved past years of disputes with South Korea and reluctantly acknowledged the mines’ dark history, promising to hold an annual memorial service for all victims, including hundreds of Koreans who were mobilized to work in the mines.

Korean officials skipped Japan's memorial service held near the Sado mine site, Sunday, in an apparent protest against Tokyo’s 'insincerity' in addressing the dark history related to the site, where approximately 1,

South Korea says it will not attend a ceremony in Japan to commemorate victims of forced labor in the Sado Island Gold Mines. This comes as the two nations seek to draw together amid regional threats.