A minister-level summit between the Koreas has not happened since 2007.
Prime Minister David Cameron led a high-level summit where delegates committed to supporting a historic reduction in "under-nutrition".
The Prime Minister told the summit that the referendum would settle Britain's place in Europe "for a generation".
Shlomo Ben-Ami, Israel's acting foreign minister, said a summit to sign an agreement could be held next month.
Mark Rutte: Dutch PM opposed to Mr Juncker, due to meet Irish prime minister after Swedish summit to discuss alternative candidates.
Relations with Japan deteriorated as China rejected calls by Japanese Prime Minister Shinzo Abe for a summit.
"Greece already received $300 billion, with no war, with no Russian tanks," Arseniy Yatsenyuk, the prime minister, said after the summit.
First Minister Carwyn Jones said the summit represented an opportunity for Wales' defence-related industries.
Enterprise Minister Arlene Foster described the summit decision as "marvellous news" for Northern Ireland.
In November, the British prime minister, David Cameron, held a summit at Downing Street on online safety.
Mr Obama spoke after holding his first substantive talks with the new Japanese Prime Minister at the Apec summit.
