The government declined calls for Prime Minister Shinzo Abe to join Western leaders in condemning Russia in December over the Syrian civil war, fearing that doing so would negatively affect his impending summit with Russian President Vladimir Putin, diplomatic sources said.

Japan's dissociation from that action, despite its role this year as chair of the Group of Seven industrialized nations, has drawn criticism that it put its interests ahead of the humanitarian crisis in the city of Aleppo and damaged G-7 solidarity.

In a statement issued Dec. 7, the leaders of Britain, Germany, France, Italy, Canada and the United States called for an immediate cease-fire in Aleppo, condemned the Syrian government for its attacks, and condemned Russia, Syria's chief backer, for blocking humanitarian aid.