SADO, Japan (AP) — Japanese officials have held a memorial ceremony near the Sado Island Gold Mines, listed in July as a UNESCO World Heritage site after Japan moved past years of historical disputes with South Korea and reluctantly acknowledged the mines' dark history. However, it has not offered an apology.

SADO: Japanese officials on Sunday paid tribute to workers at the Sado Island Gold Mines but refrained from offering an apology for Japan’s wartime use of Korean forced laborers, underscoring persistent tensions between the two countries over historical issues.

South Korea expressed regret to Japan on Monday over Tokyo's attitude towards a memorial service held for labourers including Koreans forced to work in Japan's Sado mines during World War Two, Seoul's foreign ministry said.