Yoshimasa Hayashi

Japan's outgoing Prime Minister Fumio Kishida will head to Seoul on Sept. 6 for a two-day visit to meet South Korea's leader after the pair worked to significantly boost bilateral ties.

China is the "biggest" strategic challenge for the US and Japan, both sides said.

The assessment was made during a joint press conference after the 2+2 security talks held in the American capital, Washington, between the American and Japanese ministers of foreign affairs and defense, Anadolu Agency reported.