Under a split-top mountain on the Japanese island of Sado lies a network of centuries-old mines that have sparked a new diplomatic row with South Korea.
Under a split-top mountain on the Japanese island of Sado lies a network of centuries-old mines that have sparked a new diplomatic row with South Korea. Some of the gold and silver mines of Sado, off Japan's west coast, are believed to have started operating as early as the 12th…