Moon arrived here Thursday on a three-day state visit, becoming the first South Korean leader to do so in a decade.

South Korea and Cambodia initially established diplomatic ties in 1970, but their relations were severed in 1975 when Cambodia was communized.

Moon insisted there was much more room for increased cooperation between the two countries.

"I believe the countries' relationship has great potential to grow more rapidly in the future," he said at the start of his summit talks with Hun Sen, according to Cheong Wa Dae pool reports.

The Cambodian leader too expressed hope for improved relations.

"I believe we will be able to further strengthen the relationship between our two countries through President Moon Jae-in's visit and also expand the scope of cooperation between the two countries," he told Moon through his interpreter.

"I believe we may be able to push for a strategic partnership bilaterally and in multilateral settings," Hun Sen added.

The summit followed a welcome ceremony for Moon hosted by King Norodom Sihamoni.

"Prime Minister Hun Sen said he actively supports President Moon's New Southern Policy and expressed hope the South Korea-Cambodia and South Korea-ASEAN relations will continue to develop under the New Southern Policy," Cheong Wa Dae said in a press release.

The New Southern Policy is one of Moon's key foreign policy initiatives aimed at boosting South Korea's economic and diplomatic relations with the ASEAN and India.

Moon is currently on a three-nation trip that earlier took him to Brunei and Malaysia, both members of ASEAN.

Seoul is also set to host a special South Korea-ASEAN summit later in the year to commemorate the 30th anniversary of the establishment of dialogue relations between South Korea and the 10-member ASEAN.

On bilateral cooperation, Moon and Hun Sen vowed efforts to expand their countries' cooperation in agriculture, infrastructure, manufacturing and financial sectors, while calling for efforts to quickly conclude their negotiations on a tax treaty to help promote investment.

Moon promised increased support for Cambodia under his New Southern Policy, while noting that Cambodia is already the world's second-largest destination of South Korea's official development aid.

Prime Minister Hun Sen expressed his gratitude while asking for Seoul's continued support for his country's economic development.

He also reaffirmed his support for Seoul's efforts to peacefully denuclearize the Korean Peninsula. (Yonhap)