The top office says discussions are under way to hold a three-way summit of South Korea, the U.S. and Japan in New York on the sidelines of the UN General Assembly. 
A presidential official confirmed an earlier report by a Japanese daily on Wednesday. 

The official said talks were also held to arrange a trip for U.S. President Donald Trump to South Korea when he visits China in November. 

Quoting Japanese government officials, the Yomiuri Shimbun said the trilateral summit is being scheduled for September 21st. The newspaper said Tokyo wishes to confirm a joint stance of calling for China and Russia to play a constructive role in easing tensions on the Korean Peninsula.
The previous three-way summit was held in July in Hamburg, Germany on the sidelines of the G20.