Under the theme of “Sustainable energy, energy interconnection and regional energy cooperation”, the Ministry of Foreign Affairs of the Republic of Korea and ESCAP hosted the 3rd Northeast Asia Energy Security Forum on 17 December 2015 in Seoul. The meeting reviewed variables that have had major implications for energy security in Northeast Asia and examined ongoing projects on regional energy interconnection. The participants also looked into the technical, economic and institutional feasibility of grid connectivity proposals, including the Asian Super Grid using renewable wind and solar energy from the Gobi Desert of Mongolia. Energy security has been a key priority for Northeast Asia as the energy demand of the subregion is enormous. There has been a strong need for regional energy cooperation utilizing its geographical advantage from the combination of energy exporting and importing countries, but the level of cooperation has remained low.