The ASEAN Summit is an annual meeting held by the member of the Association of Southeast Asian Nations in relation to economic, and cultural development of Southeast Asian countries.

The league of ASEAN is currently connected with other countries who aimed to participate on the missions and visions of the league. Apparently, the league is conducting an annual meetings with other countries in an organization collectively known as the ASEAN dialogue partners. ASEAN +3 adds China, Japan and South Korea. The formal summit are held in three days. The usual itinerary are as follows:

The First ASEAN summit was held in February 1976 in Bali. At this summit, ASEAN expressed its readiness to "develop fruitful relations" and mutually beneficial co-operation with other countries of the region. The ASEAN leaders signed the Treaty of Amity and Cooperation in Southeast Asia.

On 2nd ASEAN summit held on Kuala Lumpur, Malaysia in 1977 was the occasion for the first summit meeting between Japan and ASEAN. Japan expressed its intention to promote co-operation with ASEAN.

Hun Sen (Khmer: ហ៊ុន សែន; born 5 August 1952) is the current Prime Minister of Cambodia and leader of the Cambodian People's Party (CPP), which has governed Cambodia since the Vietnamese-backed overthrow of the Khmer Rouge in 1979. Since the restoration of multi-party democracy in 1993, the CPP has been in a coalition with the royalist Funcinpec party.

His current, full, honorary title is Samdech Akeak Moha Sena Padei Techo Hun Sen (Khmer: សម្តេចអគ្គមហាសេនាបតីតេជោ ហ៊ុន សែន). The title "Samdech" was attached to his name in 1993 by King Norodom Sihanouk. It is only an honorary title and does not give him further powers. He has a glass eye, the result of a wound sustained during the Khmer Rouge offensive against Phnom Penh in April 1975. Hun Sen is currently the longest serving leader in South East Asia and is one of the longest serving prime ministers in the world, having been in power through various coalitions since 1985.

Hun Sen came to power with the Khmer Rouge and served as a Battalion Commander in the Eastern Region of Democratic Kampuchea (previous name of Cambodia). After falling out with the Khmer Rouge Hun Sen fled to Vietnam. Hun Sen was selected by the Vietnamese for a leadership role in the rebel army and government they were creating for Cambodia. When the Khmer Rouge regime was overthrown, Hun Sen was appointed as Foreign Minister of the Vietnamese-installed People's Republic of Kampuchea/State of Cambodia (PRK/SOC) in 1979 and in 1985 he was made Chairman of the Council of Ministers and Prime Minister, after the death of Chairman Chan Sy until 1990, (with a brief interruption from 1986 until 1987). As Foreign Minister, Hun Sen was a key figure in the Paris Peace Talks, which brokered peace in Cambodia.