US Secretary of State Marco Rubio, Japan’s Foreign Minister Motegi Toshimitsu, and Republic of Korea Foreign Minister Cho Hyun reaffirmed their countries’ trilateral partnership during a meeting on the sidelines of the United Nations General Assembly in New York on Monday (21 Sep).

The ministers reiterated support for a free and open Indo-Pacific, called for the complete denuclearisation of North Korea, and said the path to dialogue with Pyongyang remains open.

Key developments:

  • Reaffirmed cooperation on regional security, extended deterrence and peace across the Taiwan Strait.
  • Expanded collaboration on supply chain resilience, semiconductors, AI, quantum technology and energy security, including small modular reactors.
  • Launched new initiatives on economic security, disaster relief, organised crime and maritime law enforcement cooperation.

The three governments also committed to maintaining regular high-level consultations and strengthening regional and global engagement.

ℹ️ US Department of State

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South Korea’s Foreign Minister Cho Hyun and Japanese Foreign Minister Motegi Toshimitsu meet with U.S. Secretary of State Marco Rubio on the sidelines of the 81st United Nations General Assembly in New York City, US, September 21, 2026. REUTERS/Jeenah Moon/Pool
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US, Japan and South Korea reaffirm trilateral cooperation on the sidelines of the UN General Assembly 
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