During his trip, President Moon had meetings with Sultan of Brunei Hassanal Bolkiah, Malaysian Prime Minister Mahathir Mohamad and Cambodian Prime Minister Hun Sen.
At their talks, the two sides pledged to promote cooperation in various areas such as energy, infrastructure and technology.
The RoK side expressed hope for greater cooperation with ASEAN.
During his trip, Moon also attended economic forums of businesses.
The RoK has been pushing its New Southern Policy designed to cement largely relations with the 10-member Association of Southeast Asian Nations (ASEAN). The grouping is among the RoK’s important partners due to its growth potential, rich resources and growing diplomatic influence.
ASEAN groups Brunei, Cambodia, Indonesia, Laos, Malaysia, Myanmar, the Philippines, Singapore, Thailand and Vietnam.