Premier Li Keqiang is urging the Japanese business community to support and propel the current momentum of improving bilateral ties.

In a speech to business and former government leaders from the two countries in Beijing on Tuesday, Li said: "Frankly speaking, the foundation of China-Japan relations is not solid enough," although exchanges and cooperation in a range of fields have been on the rise.

"It is necessary for both sides to make more and more efforts," he said at the Great Hall of the People as top corporate executives of the two countries met for their annual meeting to discuss ways to expand economic ties despite years of political tension.