IV. ACTIONS IN RESPONSE TO AN ARMED ATTACK AGAINST JAPAN
Bilateral actions in response to an armed attack against Japan remain a core aspect of U.S.-Japan defense cooperation.
When an armed attack against Japan is imminent, the two Governments will take steps to prevent further deterioration of the situation and make preparations necessary for the defense of Japan. When an armed attack against Japan takes place, the two Governments will conduct appropriate bilateral actions to repel it at the earliest possible stage.
1. When an Armed Attack against Japan is Imminent
The two Governments will intensify information and intelligence sharing and policy consultations, and initiate at an early stage the operation of a bilateral coordination mechanism. Cooperating as appropriate, they will make preparations necessary for ensuring coordinated responses according to the readiness stage selected by mutual agreement. Japan will establish and maintain the basis for U.S. reinforcements. As circumstances change, the two Governments will also increase intelligence gathering and surveillance, and will prepare to respond to activities which could develop into an armed attack against Japan.
The two Governments will make every effort, including diplomatic efforts, to prevent further deterioration of the situation.
Recognizing that a situation in areas surrounding Japan may develop into an armed attack against Japan, the two Governments will be mindful of the close interrelationship of the two requirements: preparations for the defense of Japan and responses to or preparations for situations in areas surrounding Japan.
2. When an Armed Attack against Japan Takes Place
(1) Principles for Coordinated Bilateral Actions
Japan will have primary responsibility immediately to take action and to repel an armed attack against Japan as soon as possible. The United States will provide appropriate support to Japan. Such bilateral cooperation may vary according to the scale, type, phase, and other factors of the armed attack. This cooperation may include preparations for and execution of coordinated bilateral operations, steps to prevent further deterioration of the situation, surveillance, and intelligence sharing.
In conducting bilateral operations, U.S. Forces and the Self-Defense Forces will employ their respective defense capabilities in a coordinated, timely, and effective manner. In doing this, they will conduct effective joint operations of their respective Forces' ground, maritime and air services. The Self-Defense Forces will primarily conduct defensive operations in Japanese territory and its surrounding waters and airspace, while U.S. Forces support Self-Defense Forces' operations. U.S. Forces will also conduct operations to supplement the capabilities of the Self-Defense Forces.
The United States will introduce reinforcements in a timely manner, and Japan will establish and maintain the basis to facilitate these deployments.
(2) Concept of Operations
Operations to Counter Air Attack against Japan
U.S. Forces and the Self-Defense Forces will bilaterally conduct operations to counter air attack against Japan.
The Self-Defense Forces will have primary responsibility for conducting operations for air defense.
U.S. Forces will support Self-Defense Forces' operations and conduct operations, including those which may involve the use of strike power, to supplement the capabilities of the Self-Defense Forces.
Operations to Defend Surrounding Waters and to Protect Sea Lines of Communication
U.S. Forces and the Self-Defense Forces will bilaterally conduct operations for the defense of surrounding waters and for the protection of sea lines of communication.
The Self-Defense Forces will have primary responsibility for the protection of major ports and straits in Japan, for the protection of ships in surrounding waters, and for other operations.
U.S. Forces will support Self-Defense Forces' operations and conduct operations, including those which may provide additional mobility and strike power, to supplement the capabilities of the Self-Defense Forces.
Operations to Counter Airborne and Seaborne Invasions of Japan
U.S. Forces and the Self-Defense Forces will bilaterally conduct operations to counter airborne and seaborne invasions of Japan.
The Self-Defense Forces will have primary responsibility for conducting operations to check and repel such invasions.
U.S. Forces will primarily conduct operations to supplement the capabilities of the Self-Defense Forces. The United States will introduce reinforcements at the earliest possible stage, according to the scale, type, and other factors of the invasion, and will support Self-Defense Forces' operations.
Responses to Other Threats
The Self-Defense Forces will have primary responsibility to check and repel guerrilla-commando type attacks or any other unconventional attacks involving military infiltration in Japanese territory at the earliest possible stage. They will cooperate and coordinate closely with relevant agencies, and will be supported in appropriate ways by U.S. Forces depending on the situation.
U.S. Forces and the Self-Defense Forces will cooperate and coordinate closely to respond to a ballistic missile attack. U.S. Forces will provide Japan with necessary intelligence, and consider, as necessary, the use of forces providing additional strike power.
(3) Activities and Requirements for Operations
Command and Coordination
U.S. Forces and the Self-Defense Forces, in close cooperation, will take action through their respective command-and-control channels. To conduct effective bilateral operations, the two Forces will establish, in advance, procedures which include those to determine the division of roles and missions and to synchronize their operations.
Bilateral Coordination Mechanism
Necessary coordination among the relevant agencies of the two countries will be conducted through a bilateral coordination mechanism. In order to conduct effective bilateral operations, U.S. Forces and the Self-Defense forces will closely coordinate operations, intelligence activities, and logistics support through this coordination mechanism including use of a bilateral coordination center.
Communications and Electronics
The two Governments will provide mutual support to ensure effective use of communications and electronics capabilities.
Intelligence Activities
The two Governments will cooperate in intelligence activities in order to ensure effective bilateral operations. This will include coordination of requirements, collection, production, and dissemination of intelligence products. Each Government will be responsible for the security of shared intelligence.
Logistics Support Activities
U.S. Forces and the Self-Defense Forces will conduct logistics support activities efficiently and properly in accordance with appropriate bilateral arrangements.
To improve the effectiveness of logistics and to alleviate functional shortfalls, the two Governments will undertake mutual support activities, making appropriate use of authorities and assets of central and local government agencies, as well as private sector assets. Particular attention will be paid to the following points in conducting such activities:
Supply
The United States will support the acquisition of supplies for systems of U.S. origin while Japan will support the acquisition of supplies in Japan.
Transportation
The two Governments will closely cooperate in transportation operations, including airlift and sealift of supplies from the United States to Japan.
Maintenance
Japan will support the maintenance of U.S. Forces' equipment in Japan; the United States will support the maintenance of items of U.S. origin which are beyond Japanese maintenance capabilities. Maintenance support will include the technical training of maintenance personnel as required. Japan will also support U.S. Forces' requirement for salvage and recovery.
Facilities
Japan will, in case of need, provide additional facilities and areas in accordance with the U.S.-Japan Security Treaty and its related arrangements. If necessary for effective and efficient operations, U.S. Forces and the Self-Defense Forces will make joint use of Self-Defense Forces facilities and U.S. facilities and areas in accordance with the Treaty and its related arrangements.
Medical Services
The two Governments will support each other in the area of medical services such as medical treatment and transportation of casualties.
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