The leaders of South Korea, Japan and the United States issued a joint statement Sunday marking the anniversary of their summit at Camp David and reaffirmed a pledge to jointly tackle regional challenges, South Korea's presidential office said.

The principles on trilateral cooperation established at the summit last year continue to serve as a roadmap for the three countries' cooperation, the statement issued by South Korean President Yoon Suk Yeol's office said.

"We stand by our commitment to consult on regional challenges, provocations and threats affecting our collective interests and security," it said.

U.S. President Joe Biden, Japanese Prime Minister Fumio Kishida and Yoon met on Aug. 18 last year and agreed to deepen military and economic cooperation and take a united stand against China's growing power and security threats from North Korea.

South Korean media have said the leaders plan to meet again this year, citing unnamed sources, but it was not yet clear when, especially since Kishida has announced he would be stepping down.

A senior South Korean presidential official said there will be two or three occasions where the three leaders will have the chance to meet and discussions over those plans are still in the early stages.

The spirit of cooperation among the three countries will live on even after Biden and Kishida leave office, the official told reporters on the condition of anonymity.

"The three main actors who established the Camp David framework of cooperation won't be in their roles forever," he said.