Senior U.S. diplomat to visit Seoul to launch working groups on October 2025 summit agreements

A senior U.S. diplomat will visit Seoul in the coming weeks to launch bilateral working groups to implement agreements from a summit between Korean President Lee Jae Myung and U.S. President Donald Trump in October of last year, the countries' governments said on Tuesday.

U.S. Under Secretary of State for Political Affairs Allison Hooker will lead a U.S. delegation to Seoul after she and Korean First Vice Foreign Minister Park Yoon-joo held talks at the department in Washington, the Korean Ministry of Foreign Affairs and the U.S. Department of State said.

Park arrived in the U.S. capital on Monday as part of efforts to accelerate progress in implementing the summit agreements, including U.S. cooperation on Seoul's push to build nuclear-powered submarines and secure rights to civil uranium enrichment and spent nuclear fuel reprocessing.

“Under Secretary Hooker will lead an interagency delegation to Seoul in the coming weeks to launch bilateral working groups to continue implementing understandings from President Trump's October 2025 visit to the ROK,” the U.S. State Department said in a media note. The ROK stands for the Republic of Korea, Korea's official name.

The department did not elaborate on the understandings, but it apparently referred to those specified in a joint fact sheet released to outline bilateral summit agreements on security, trade, investment and other bilateral issues.

In the fact sheet, the United States codified its approval for Korea to build nuclear-powered, conventionally-armed attack submarines and its support for a process that will “lead to the ROK's civilian uranium enrichment and spent fuel reprocessing for peaceful uses.”

In its press release, Seoul's ministry said that Park and Hooker agreed to hold a “kickoff” meeting for the implementation of bilateral agreements in the security sector based on the shared understanding that the two sides should make tangible progress through the swift implementation of the agreements outlined in the fact sheet.

Park's visit to Washington this week came amid concerns over the seemingly slow implementation of those agreements.

During their talks, Park and Hooker discussed efforts to advance the “broad and enduring” alliance between the two countries, including in security and economic cooperation, it said.

Both sides reaffirmed the importance of ensuring the freedom of navigation through the Strait of Hormuz and in global waterways, according to the department.

The U.S. side reaffirmed its commitment to the defense of Korea, including through its “extended deterrence” commitments. Extended deterrence refers to the United States' commitment to use the full range of its military capabilities, including nuclear arms, to defend its allies.

At the talks, Hooker emphasized that the United States expects continued progress in the bilateral trade and industrial partnership and underscored the need to ensure “fair” treatment of U.S. companies and the prompt resolution of market access barriers.

Park explained to Hooker the outcomes of a summit between President Lee and Japanese Prime Minister Sanae Takaichi in Korea's southern city of Andong on Tuesday and reaffirmed Seoul's commitment to strengthening ties with Japan and trilateral cooperation with the United States and Japan, according to the ministry.

Ahead of his talks with Hooker, Park met with U.S. Deputy National Security Adviser Andrew Baker and other officials at the White House National Security Council (NSC).

Park called for close bilateral communication to ensure the swift and smooth implementation of agreements in the joint fact sheet, the ministry said.

Baker said that the U.S. NSC will actively support related consultations, it said.

Yonhap