South Korea's chief negotiator, Deputy Foreign Minister Lee Soo-hyuck, will meet with James Kelly, U.S. assistant secretary of state, and Mitoji Yabunaka, director-general of Japan's Foreign Ministry, to coordinate strategy.
The three officials will also consult with Russian and Chinese representatives during the three days of talks.
The Korea Times said Lee is expected to promise massive aid to Pyongyang in return for its renunciation of nuclear weapons.
The six participating nations' representatives are to deliver speeches during the opening of talks Wednesday, spend Thursday in discussions and issue a joint statement Friday.
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