Japan is considering delaying a plan to nominate a gold and silver mine site on Sado Island in Niigata Prefecture for the 2023 UNESCO World Heritage list, after facing opposition from South Korea over wartime labor of Koreans at the mine, government sources said Thursday.The Japanese government would seek to recommend the site for U.N. Educational, Scientific, and Cultural Organization's World Cultural Heritage list for 2024 or later if not submitting a recommendation to UNESCO by the Feb. 1 deadline, the sources said.South Korea's Foreign Ministry spokesperson said in a commentary that Jap…READ FULL ARTICLE