# US-Japan-South Korea trilateral cooperation

> Live situation record from CLSTR: https://clstr.news/situations/us-japan-south-korea-trilateral-cooperation
> Updated: 2026-09-21T18:17:02.000Z. Sources: 12. Developments: 2.

Foreign ministers from the United States, Japan, and South Korea met in New York to strengthen trilateral cooperation on economic security and regional stability. The group issued a joint statement opposing economic coercion and arbitrary export restrictions that disrupt global supply chains, while establishing a new trilateral economic security consultation mechanism to bolster critical technology and supply chain resilience.

The ministers also addressed security concerns in the Indo-Pacific, specifically reaffirming a commitment to the complete denuclearization of North Korea and urging the country to return to diplomatic dialogue. They expressed opposition to unilateral attempts to change the status quo in the Taiwan Strait and emphasized the importance of maintaining freedom of navigation and lawful commerce throughout the region. Additionally, the diplomats raised concerns regarding North Korean cyber activities, including the use of IT workers to fund weapons programs.

## Claims

- The foreign ministers of Japan, the United States, and South Korea issued a joint statement in New York. (corroborated by 5 sources)
- The three nations oppose arbitrary export restrictions and economic coercion that disrupt supply chains. (corroborated by 5 sources)
- The three countries reaffirmed their commitment to the complete denuclearization of North Korea. (corroborated by 4 sources)
- The ministers expressed opposition to any unilateral attempts to change the status quo in the Taiwan Strait. (corroborated by 4 sources)
- The ministers called on North Korea to return to dialogue to resolve regional issues. (corroborated by 4 sources)
- The three nations support Taiwan's meaningful participation in appropriate international organizations. (corroborated by 3 sources)
- The three countries welcomed the launch of a new trilateral economic security consultation mechanism. (corroborated by 2 sources)
- The three nations are expected to sign an MOU regarding economic security and energy cooperation in the Arctic region. (single source)

## Timeline

### 2026-09-21: US, Japan, and South Korea reaffirm trilateral alliance in New York

The US, Japan, and South Korea reaffirmed their commitment to North Korea's complete denuclearization and Indo-Pacific stability during trilateral talks at the UN General Assembly in New York.

4 sources. https://clstr.news/cluster/us-japan-and-south-korea-reaffirm-trilateral-alliance-in-new-york

### 2026-09-20: US, Japan, and South Korea pledge cooperation on economic security

The foreign ministers of the US, Japan, and South Korea issued a joint statement in New York opposing economic coercion, reaffirming North Korean denuclearization, and supporting stability in the Taiwan Strait.

8 sources. https://clstr.news/cluster/south-korea-us-and-japan-to-sign-arctic-cooperation-mou

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Cite as: US-Japan-South Korea trilateral cooperation. CLSTR, https://clstr.news/situations/us-japan-south-korea-trilateral-cooperation