From left, German Chancellor Angela Merkel, U.S. President Barack Obama, Japanese Prime Minister Shinzo Abe, and French President Francois Hollande participate in a tree planting ceremony during a visit to the Ise Jingu shrine in Ise, Mie Prefecture, Japan, Thursday, May 26, 2016, as part of the G-7 Summit. REUTERS/Carolyn Kaster/Pool

From left, German Chancellor Angela Merkel, U.S. President Barack Obama, Japanese Prime Minister Shinzo Abe, and French President Francois Hollande participate in a tree planting ceremony during a visit to the Ise Jingu shrine in Ise, Mie Prefecture, Japan, Thursday, May 26, 2016, as part of the G-7 Summit. REUTERS/Carolyn Kaster/Pool

From left, German Chancellor Angela Merkel, U.S. President Barack Obama, Japanese Prime Minister Shinzo Abe, and French President Francois Hollande participate in a tree planting ceremony during a visit to the Ise Jingu shrine in Ise, Mie Prefecture, Japan, Thursday, May 26, 2016, as part of the G-7 Summit. REUTERS/Carolyn Kaster/Pool

June 1, 2016 4:41 PM (UTC+8)