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Camp David US–Japan–South Korea summit
Aug 18, 2023· Treaty or event
FactTreaties, membership, measured data, events.
The August 18, 2023 summit where US, Japanese and South Korean leaders agreed to make three-way security cooperation routine.
See it on the Geopolitics map →The picture
Joe Biden, Fumio Kishida and Yoon Suk Yeol met at the US presidential retreat in Maryland, the first standalone summit of the three. They pledged annual leaders' meetings, a 'commitment to consult' in crises, real-time sharing of North Korean missile-warning data (running since December 2023) and yearly joint 'Freedom Edge' exercises. It followed Yoon's March 2023 plan to settle wartime forced-labor claims through a Korean fund, which eased Japan–Korea tensions, though some victims and Korea's opposition rejected it.
Why it matters
It turned two separate US alliances into a working triangle, a notable step given Japan's colonial rule of Korea, and was designed to outlast changes of government.
Key facts and numbers
The 'Spirit of Camp David' statement, the Camp David Principles and Commitment to Consult documents, plus defense ministries' announcements of the data link and exercises.
What to watch
Outlook: whether it survives new leaders in all three capitals and renewed history disputes; as of 2026, ministers and militaries have kept the format going.
Connections (2)
▸Camp David US–Japan–South Korea summit added a trilateral layer to US–Japan allianceFact
The relationship
Camp David added a three-way layer on top of the US–Japan treaty: Tokyo agreed to consult Seoul and Washington in crises and to share missile-warning data in real time. It created no new defense treaty; Japan's US guarantee is unchanged, but Japanese forces now train regularly with South Korea's.
Since when and why
Camp David, Maryland, August 18, 2023; the first Freedom Edge exercise followed in June 2024.
How we know
The published summit documents and Japanese Defense Ministry announcements of the data link and drills.
What to watch
Whether shifting politics in Tokyo and Seoul, and unresolved history disputes, limit how far the trilateral layer goes.
▸Camp David US–Japan–South Korea summit added a trilateral layer to US–South Korea allianceFact
The relationship
For Seoul, Camp David tied its US alliance to Japan's, adding Japanese radar data on North Korean launches and US-backed coordination with Japan's forces. President Yoon took a political risk by easing wartime-history disputes; his successor Lee, once a sharp critic of that policy, has kept the framework.
Since when and why
Camp David, August 18, 2023; data sharing began in December 2023; Lee visited Tokyo in August 2025 before his first Washington summit.
How we know
The summit texts, South Korean Defense Ministry statements, and Lee's public commitments to trilateral cooperation.
What to watch
Whether disputes over forced labor, 'comfort women' and Dokdo, which Japan calls Takeshima, could again freeze cooperation.