South Korea has paid tribute to wartime Korean forced laborers at Japan's Sado gold mines in a memorial ceremony.

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.

South Korea’s government says it has decided not to attend a memorial service near Japan’s Sado Island Gold Mines due to unspecified disagreements with Japan over the event, which stirred longstanding tensions over the abuse of Korean forced laborers at the site before the end of World War II.

South Korea’s decision not to participate in what was envisioned an a moment of reconciliation highlighted the perceived lack of sincerity in Japan’s treatment of historical issues.

South Korea has expressed regret to Japan over the way Tokyo has handled the memorial ceremony for the wartime forced labor victims, including Koreans, from an old Japanese mine complex during World War II,

By Jack Kim SEOUL (Reuters) -After boycotting a memorial event organised by Tokyo, South Korea held its own on Monday to remember compatriots forced to work in a Japanese mine during World War Two, highlighting lingering sensitivities between the key U.