The strengthening of trilateral cooperation through the summit will be one of the most significant political, diplomatic capstones and will signify a strategic shift in the region, said Emanuel.

The three leaders are expected to release two documents, namely an overarching document and a normal communique, he said, adding that both national security and economic security will be on the agenda.

US President Joe Biden will host the tripartite summit with Japanese Prime Minister Fumio Kishida and South Korean President Yoon Suk-yeol at the Camp David presidential retreat near Washington on August 18.