SEOUL, Nov. 27 (Yonhap) -- Foreign Minister Cho Tae-yul said Wednesday he takes "full responsibility" for the controversy over Japan's memorial ceremony for Korean wartime forced labor victims, expressing regret over Tokyo's failure to honor the promises it made to the international community.

The top diplomats of South Korea and Japan agreed Tuesday to keep the momentum alive for bilateral cooperation, despite discord over a memorial event for Korean victims of Japan's wartime forced labor,

Japan will go ahead with a memorial ceremony on Sunday near the Sado Island Gold Mines, despite South Korea’s last-minute boycott of the event that highlighted tensions between the neighbors over the issue of Korean forced laborers at the site before and during 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 paid tribute to wartime Korean forced laborers at Japan’s Sado Island Gold Mines in a memorial ceremony on Monday, a day after boycotting a similar event organized by Japan, as tensions over historical atrocities continue to impact relations between the two sides.

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.