Moon underscored the importance of the US-North Korea summit, noting its success may well determine the fate of his country, as well as North Korea.

Denuclearization, he said, "is not something that can be realized only through an agreement between the South and the North. It requires a US guarantee, and that would require normalization of the North-US relationship or even economic cooperation between the two."

"I ask you to prepare for the talks with such an objective and vision," Moon told the preparation committee, according to Cheong Wa Dae spokesman Kim Eui-kyeom.

He also told the preparation committee to clearly show what North Korea, as well as the US, will gain through a peaceful resolution of the North Korean nuclear issue.

"I ask you to make preparations so that we can show and persuade, from an objective point of view, how the South, the North and the US may each benefit and how they may exchange such benefits," the president said, according to the pool reports.

Moon noted the upcoming talks, especially the US-North Korea summit, will mark an "unexplored path."

Still, their objective and how to achieve that may be very clear, he said.

"Though it is an unexplored path we have never walked, we have clear plans and a clear vision of goals we seek to achieve through an agreement between the leaders of the South, North and the US," Moon said.

"They may be the denuclearization of the Korean Peninsula, a permanent peace regime on the Korean Peninsula and the normalization of the North-US relationship, development of South-North Korean relations and economic cooperation between the North and the US or the North, US and South Korea," he added.

Meanwhile, the preparation committee has decided to propose holding high-level dialogue with North Korea next Thursday to discuss details of the upcoming inter-Korean summit, according to the Cheong Wa Dae spokesman.

Seoul hopes to hold the inter-Korean dialogue in the joint security area of Panmunjom, which is also the venue for the envisioned inter-Korean summit, Kim told a press briefing.

The proposal will soon be delivered to North Korea by Seoul's unification ministry, he added. (Yonhap)