The South Korean foreign minister called Tuesday for "sincere" actions to defuse the tension over wartime history in Northeast Asia, pressing Japanese leaders to take a more conciliatory tone.

Yun Byung-se said after meeting with U.S. Secretary of State John Kerry in Washington that they recognized growing uncertainty pervading Northeast Asia in recent times.

Yun did not go into specifics but said, "I pointed out that historical issues stand in the way of reconciliation and cooperation in this region and I emphasized the need for sincere actions."