Chinese President Xi Jinping may visit Japan for next year's summit of the Group of 20 advanced and emerging economies, diplomatic sources said Thursday.

Tokyo, meanwhile, is hoping Prime Minister Shinzo Abe can visit China as early as this fall, as this year marks the 40th anniversary of the signing of a friendship treaty between the two countries, the sources said.

If Xi's state visit is realized he will become the first Chinese leader to visit Japan since Hu Jintao in 2008.