Japanese Prime Minister Shinzo Abe welcomed the leaders of the G20 economies and other participants prior to the start of the summit.
Established in 1999, the G20 is a central forum for international cooperation on financial and economic issues. It comprises 19 countries plus the European Union (EU).
The countries are Argentina, Australia, Brazil, Canada, China, France, Germany, India, Indonesia, Italy, Japan, Mexico, Russia, Saudi Arabia, South Africa, the Republic of Korea, Turkey, Britain and the United States.