United States–Japan security alliance

E6041

bilateral security alliance defense partnership military alliance

The United States–Japan security alliance is a post–World War II defense partnership under which the U.S. guarantees Japan’s security and maintains military forces in and around Japan, forming a cornerstone of security architecture in the Asia-Pacific region.

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All labels observed (28)

Label	Occurrences
U.S.–Japan security alliance	7
United States–Japan security alliance canonical	6
Japan–United States alliance	4
Treaty of Mutual Cooperation and Security between the United States and Japan	4
Japan–United States security alliance	3
U.S.–Japan Security Treaty	3
U.S.–Japan alliance	3
Japan–United States relations	2
U.S.–Japan military alliance	2
United States–Japan alliance	2
1951 U.S.–Japan Security Treaty	1
1997 Guidelines for U.S.–Japan Defense Cooperation	1
2015 Guidelines for U.S.–Japan Defense Cooperation	1
Japan-U.S. security alliance	1
Japan–U.S. Security Treaty	1
Japan–U.S. security alliance	1
Japan–United States Security Treaty	1
Japan–United States Security Treaty (as territories under Japanese administration)	1
Japan–United States security arrangements	1
U.S.-Japan alliance	1
U.S.-Japan security treaty	1
U.S.–Japan Alliance	1
U.S.–Japan security alliance infrastructure	1
U.S.–Japan security framework	1
US–Japan alliance	1
US–Japan relations	1
United States–Japan security arrangements	1
新日米安全保障条約	1

How this entity was disambiguated

This entity first appeared as the object of triple T27631 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: United States–Japan security alliance
Context triple: [United States Navy, allianceMember, United States–Japan security alliance]

A. ANZUS
ANZUS is a security pact formed in 1951 between Australia, New Zealand, and the United States to promote mutual defense and military cooperation in the Pacific region.
B. North Atlantic Treaty
The North Atlantic Treaty is the 1949 founding agreement that created the NATO military alliance, establishing collective defense commitments among Western nations during the early Cold War.
C. Anglo-American relations
Anglo-American relations refers to the historical, political, and cultural relationship between the United Kingdom and the United States, encompassing their diplomatic ties, alliances, and mutual influences over time.
D. NATO
NATO is a political and military alliance of North American and European countries formed for collective defense and security cooperation.
E. Truman Doctrine
The Truman Doctrine was a U.S. foreign policy announced in 1947 that committed the United States to providing political, military, and economic assistance to countries threatened by communism, marking the start of the Cold War containment strategy.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: United States–Japan security alliance
Target entity description: The United States–Japan security alliance is a post–World War II defense partnership under which the U.S. guarantees Japan’s security and maintains military forces in and around Japan, forming a cornerstone of security architecture in the Asia-Pacific region.

A. ANZUS
ANZUS is a security pact formed in 1951 between Australia, New Zealand, and the United States to promote mutual defense and military cooperation in the Pacific region.
B. North Atlantic Treaty
The North Atlantic Treaty is the 1949 founding agreement that created the NATO military alliance, establishing collective defense commitments among Western nations during the early Cold War.
C. Anglo-American relations
Anglo-American relations refers to the historical, political, and cultural relationship between the United Kingdom and the United States, encompassing their diplomatic ties, alliances, and mutual influences over time.
D. NATO
NATO is a political and military alliance of North American and European countries formed for collective defense and security cooperation.
E. Atlantic Charter agreement
The Atlantic Charter agreement was a pivotal 1941 joint declaration by the United States and the United Kingdom that outlined shared war aims and principles for the post–World War II international order, including self-determination, free trade, and collective security.
F. None of above. chosen

Statements (48)

Predicate	Object
instanceOf	bilateral security alliance ⓘ defense partnership ⓘ military alliance ⓘ
allows	stationing of United States Armed Forces in Japan ⓘ
alsoKnownAs	United States–Japan security alliance ⓘ surface form: Japan–U.S. security alliance United States–Japan security alliance ⓘ surface form: U.S.–Japan alliance United States–Japan security alliance ⓘ surface form: U.S.–Japan security alliance
basedOnTreaty	United States–Japan security alliance self-linksurface differs ⓘ surface form: Treaty of Mutual Cooperation and Security between the United States and Japan
component	U.S. Forces Japan ⓘ U.S. military bases in Okinawa Prefecture ⓘ United States Seventh Fleet presence around Japan ⓘ bilateral defense guidelines ⓘ bilateral joint military exercises ⓘ bilateral security consultations ⓘ
coreObligationOfJapan	provide bases and facilities for U.S. forces in Japan ⓘ
coreObligationOfUnitedStates	defend Japan if it is attacked ⓘ
country1	United States of America ⓘ surface form: United States
country2	Japan ⓘ
focusArea	deterrence against nuclear and conventional threats in Northeast Asia ⓘ maritime security in the Western Pacific ⓘ protection of sea lanes of communication ⓘ
hasControversy	domestic opposition in Japan to U.S. bases, especially in Okinawa ⓘ
headquartersLocation	Tokyo ⓘ
includes	extended deterrence commitments by the United States ⓘ
influencedBy	Article 9 of the Constitution of Japan ⓘ
involves	collective self-defense arrangements limited by Japan’s constitution ⓘ
keyPartnerInstitution	Japan Ministry of Defense ⓘ Japan Self-Defense Forces ⓘ Department of Defense ⓘ surface form: United States Department of Defense
legalBasis	United States–Japan security alliance self-linksurface differs ⓘ surface form: 1951 U.S.–Japan Security Treaty 1960 Treaty of Mutual Cooperation and Security ⓘ
politicalSignificance	framework for U.S.–Japan strategic cooperation ⓘ symbol of the U.S.–Japan partnership ⓘ
purpose	deter aggression against Japan ⓘ guarantee Japan’s security ⓘ maintain peace and stability in the Asia-Pacific region ⓘ support regional security architecture ⓘ
region	Asia-Pacific ⓘ Asia-Pacific ⓘ surface form: Indo-Pacific
relatedTo	ANZUS ⓘ surface form: ANZUS alliance U.S. security presence in the Western Pacific ⓘ United States–South Korea security alliance ⓘ surface form: U.S.–South Korea alliance
securityArchitectureRole	cornerstone of U.S. security strategy in East Asia ⓘ pillar of the regional hub-and-spokes alliance system ⓘ
significantEvent	1960 revision of the U.S.–Japan Security Treaty ⓘ
startTime	1951 ⓘ
updatedBy	United States–Japan security alliance self-linksurface differs ⓘ surface form: 1997 Guidelines for U.S.–Japan Defense Cooperation United States–Japan security alliance self-linksurface differs ⓘ surface form: 2015 Guidelines for U.S.–Japan Defense Cooperation

How these facts were elicited

Referenced by (54)

Full triples — surface form annotated when it differs from this entity's canonical label.

United States Navy → allianceMember → United States–Japan security alliance ⓘ

Liberal Democratic Party → supports → United States–Japan security alliance ⓘ

this entity surface form: Japan–United States alliance

United States Armed Forces → allianceMemberOf → United States–Japan security alliance ⓘ

Shinzo Abe (as Minister for Foreign Affairs) → associatedWithPolicyArea → United States–Japan security alliance ⓘ

this entity surface form: Japan–United States relations

Showa era → keyAlliancePostwar → United States–Japan security alliance ⓘ

subject surface form: Shōwa era

this entity surface form: Japan–United States alliance

United States–Japan security alliance → basedOnTreaty → United States–Japan security alliance self-linksurface differs ⓘ

this entity surface form: Treaty of Mutual Cooperation and Security between the United States and Japan

United States–Japan security alliance → alsoKnownAs → United States–Japan security alliance ⓘ

this entity surface form: U.S.–Japan security alliance

United States–Japan security alliance → alsoKnownAs → United States–Japan security alliance ⓘ

this entity surface form: Japan–U.S. security alliance

United States–Japan security alliance → alsoKnownAs → United States–Japan security alliance ⓘ

this entity surface form: U.S.–Japan alliance

United States–Japan security alliance → legalBasis → United States–Japan security alliance self-linksurface differs ⓘ

this entity surface form: 1951 U.S.–Japan Security Treaty

United States–Japan security alliance → updatedBy → United States–Japan security alliance self-linksurface differs ⓘ

this entity surface form: 1997 Guidelines for U.S.–Japan Defense Cooperation

United States–Japan security alliance → updatedBy → United States–Japan security alliance self-linksurface differs ⓘ

this entity surface form: 2015 Guidelines for U.S.–Japan Defense Cooperation

Jimintō → supports → United States–Japan security alliance ⓘ

this entity surface form: Japan–United States alliance

Washington Naval Conference period → hasImpactOn → United States–Japan security alliance ⓘ

this entity surface form: US–Japan relations

United States Ambassador to Japan → associatedWith → United States–Japan security alliance ⓘ

this entity surface form: U.S.–Japan alliance

Senkaku Islands → securityCoveredBy → United States–Japan security alliance ⓘ

this entity surface form: Japan–United States Security Treaty (as territories under Japanese administration)

Japan Self-Defense Forces → alliance → United States–Japan security alliance ⓘ

Toshimitsu Motegi (as Minister for Foreign Affairs of Japan) → areaOfInfluence → United States–Japan security alliance ⓘ

subject surface form: Toshimitsu Motegi

this entity surface form: Japan–United States relations

United States Indo-Pacific strategy → includesMechanism → United States–Japan security alliance ⓘ

this entity surface form: U.S.-Japan alliance

U.S. Forces Japan → formedAsPartOf → United States–Japan security alliance ⓘ

this entity surface form: U.S.–Japan security alliance

U.S. Forces Japan → allianceFramework → United States–Japan security alliance ⓘ

this entity surface form: U.S.–Japan security alliance

1960 Treaty of Mutual Cooperation and Security → subject → United States–Japan security alliance ⓘ

this entity surface form: U.S.–Japan military alliance

Japan Ministry of Defense → playsRoleIn → United States–Japan security alliance ⓘ

this entity surface form: Japan–United States security alliance

Fifth Air Force → alliance → United States–Japan security alliance ⓘ

Camp Courtney → allianceContext → United States–Japan security alliance ⓘ

Indo-Pacific region → isCentralTo → United States–Japan security alliance ⓘ

this entity surface form: United States–Japan alliance

Mine Warfare Force → allianceContext → United States–Japan security alliance ⓘ

this entity surface form: U.S.–Japan security framework

Three Non-Nuclear Principles of Japan → relatedTo → United States–Japan security alliance ⓘ

this entity surface form: Japan–United States security arrangements

Aegis Ashore (planned, later cancelled) → strategicContext → United States–Japan security alliance ⓘ

this entity surface form: Japan–United States security alliance

Misawa Air Base → allianceContext → United States–Japan security alliance ⓘ

this entity surface form: U.S.–Japan security alliance

East Asia–United States relations → alliance → United States–Japan security alliance ⓘ

this entity surface form: United States–Japan alliance

Camp Foster → allianceContext → United States–Japan security alliance ⓘ

this entity surface form: U.S.–Japan military alliance

Camp Schwab → partOf → United States–Japan security alliance ⓘ

this entity surface form: U.S.–Japan security alliance

Camp Schwab → allianceContext → United States–Japan security alliance ⓘ

this entity surface form: Treaty of Mutual Cooperation and Security between the United States and Japan

Camp Hansen → allianceContext → United States–Japan security alliance ⓘ

this entity surface form: U.S.–Japan security alliance

Futenma Air Station → partOf → United States–Japan security alliance ⓘ

this entity surface form: United States–Japan security arrangements

Yokota Air Base → allianceContext → United States–Japan security alliance ⓘ

this entity surface form: U.S.–Japan security alliance

Commander, U.S. Forces Japan → legalBasis → United States–Japan security alliance ⓘ

this entity surface form: Treaty of Mutual Cooperation and Security between the United States and Japan

Commander, Fifth Air Force → associatedWith → United States–Japan security alliance ⓘ

this entity surface form: Japan-U.S. security alliance

岸信介 → 関与した条約 → United States–Japan security alliance ⓘ

subject surface form: 岸信介

this entity surface form: 新日米安全保障条約

Iraq Reconstruction and Support Mission → relatedTo → United States–Japan security alliance ⓘ

this entity surface form: Japan–United States security alliance

U.S.–Japan Status of Forces Agreement → basedOn → United States–Japan security alliance ⓘ

this entity surface form: Japan–U.S. Security Treaty

U.S.–Japan Status of Forces Agreement → relatedTo → United States–Japan security alliance ⓘ

this entity surface form: U.S.–Japan Alliance

National Defense Program Guidelines → relatedTo → United States–Japan security alliance ⓘ

this entity surface form: Japan–United States Security Treaty

Japan–Soviet relations → affectedBy → United States–Japan security alliance ⓘ

this entity surface form: US–Japan alliance

Marine Corps Air Station Iwakuni → allianceContext → United States–Japan security alliance ⓘ

this entity surface form: U.S.–Japan Security Treaty

Yokosuka Naval Base → allianceContext → United States–Japan security alliance ⓘ

this entity surface form: U.S.-Japan security treaty

National politics of Japan → securityAllianceInfluence → United States–Japan security alliance ⓘ

this entity surface form: Japan–United States alliance

Japan–United States relations → keyTreaty → United States–Japan security alliance ⓘ

this entity surface form: Treaty of Mutual Cooperation and Security between the United States and Japan

Japan–United States relations → mainSecurityTreaty → United States–Japan security alliance ⓘ

this entity surface form: U.S.–Japan Security Treaty

All labels observed (28)

How this entity was disambiguated Show

Statements (48)

How these facts were elicited Show

Referenced by (54)

How this entity was disambiguated

How these facts were elicited