Japan & United States — United States Department of Defense
28 shared events · Importance 8 · Last updated Aug 24, 2026
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International
Japan: Worried about US reliability and potential cost-sharing demands; affected by missile alerts and carrier redeployment.
United States — United States Department of Defense: Renamed Asia headquarters, denied strategic shift; involved in exercises and carrier deployment.
Aug 24, 2026 · 9 articles
International
Japan: Participated in Quad, voiced opposition to changing status quo by force, discussed Hormuz with U.S.
United States — United States Department of Defense: Completed 12th night of attacks on Iran, escalating conflict.
Jul 19, 2026 · 131 articles
International
Japan: Japan is expected to be a key partner in the United States' push for binding bilateral agreements on critical minerals, aiming to diversify supply chains away from China.
United States — United States Department of Defense: The United States — United States Department of Defense created the OPEN AI metals program, which the Trump administration aims to use for setting critical mineral prices.
Jun 15, 2026 · 34 articles
International
Japan: Japan expressed support for trilateral security cooperation with the US and South Korea, concerned about regional stability.
United States — United States Department of Defense: The Pentagon received Trump's order to reduce the exercises. It has not publicly detailed the extent of the reduction, but the move affects military readiness and alliance coordination.
Aug 10, 2026 · 306 articles
International
Japan: Japan detected the missile launches and confirmed they fell outside its exclusive economic zone. The event may heighten its security concerns.
United States — United States Department of Defense: The Pentagon reduced its participation in drills, but the launches may prompt a reassessment of its force posture in the region.
Aug 20, 2026 · 48 articles
International
Japan: Japan's yen weakened amid oil price spikes, and the country faces energy import costs.
United States — United States Department of Defense: The Pentagon manages the war effort, facing budget shortfalls and requests for supplemental funding.
Apr 20, 2026 · 709 articles
Domestic
Japan: Japan is mentioned as a potential partner to bridge mineral supply gaps for U.S. manufacturers.
United States — United States Department of Defense: The Pentagon is providing loans and funding to critical minerals projects and enforcing the 2027 deadline to eliminate Chinese supplies.
Mar 08, 2026 · 112 articles
International
Japan: Japan>>> is one of NATO>>>'s Indo-Pacific partners whose cooperation is increasingly important for strengthening the alliance's core deterrence mission, despite United States>>> administration's lack of open support.
United States — United States Department of Defense: The United States — United States Department of Defense officials notified allies of the United States' plans to 'rightsize' its contributions to the NATO Force Model, aligning with the 2026 National Defense Strategy and the vision for 'NATO 3.0'.
May 18, 2026 · 46 articles
International
Japan: Japan>>>'s economy showed growth, and its officials expressed readiness to intervene in foreign exchange markets to support the Japan — Japanese yen>>>.
United States — United States Department of Defense: The United States — United States Department of Defense has reported the cost of the war with Iran to be $29 billion, highlighting the financial burden of the conflict.
May 07, 2026 · 362 articles
International
Japan: Japan's economy is affected by the Iran war, with its stock market experiencing volatility and firms reporting sharp rises in input costs due to higher raw material prices.
United States — United States Department of Defense: The United States — United States Department of Defense did not immediately provide details on the deployment of forces for 'Project Freedom'.
May 05, 2026 · 374 articles
International
Japan: Japan, heavily reliant on energy from the Gulf, has been particularly impacted by the conflict. The potential peace deal and reopening of the Strait of Hormuz are expected to benefit its economy.
United States — United States Department of Defense: The United States — United States Department of Defense was mentioned in relation to previous statements about Iran's defenses, providing context for the current debate.
May 02, 2026 · 472 articles
International
Japan: Japan expressed grave concern and urged China to reconsider missile testing. The test adds to Japan's worries about regional military activity.
United States — United States Department of Defense: Pentagon report cited on China's nuclear warhead estimates.
Apr 20, 2026 · 166 articles
International
Japan: Japan's licensed production of Patriots serves as a model and could see increased demand for its own missiles.
United States — United States Department of Defense: The DoD is involved in assessing technology transfer and production options.
Apr 20, 2026 · 131 articles
International
Japan: Japan issued a strong condemnation of the test, reflecting its concerns about regional security.
United States — United States Department of Defense: The US military conducts its own missile tests in the Pacific, highlighting double standards.
Aug 06, 2026 · 28 articles
International
Japan: Japan participated as a partner, with defense ministers meeting NATO counterparts.
United States — United States Department of Defense: The Pentagon announced a six-month review of U.S. forces in European Union — Europe and cut assets available to NATO.
Apr 20, 2026 · 317 articles
International
Japan: Japan's foreign minister met with Omani counterpart, discussing maritime security, reflecting concern over energy routes.
United States — United States Department of Defense: The Pentagon is involved in the naval blockade and military operations around the Strait of Hormuz, supporting the economic pressure campaign.
Aug 06, 2026 · 325 articles
Regulatory
Japan: Japanese drone manufacturers are subject to a 15% tariff, potentially affecting their exports to the US.
United States — United States Department of Defense: The Defense Department is involved in exemptions for certain products, indicating its role in national security aspects.
Aug 13, 2026 · 26 articles
International
Japan: Japan>>>'s wholesale inflation has accelerated, adding to the case for interest rate hikes by the Japan — Bank of Japan, partly influenced by global price pressures from the war.
United States — United States Department of Defense: The United States — United States Department of Defense has reported the cost of the war with Iran to be $29 billion, highlighting the financial burden of the conflict.
Apr 20, 2026 · 607 articles
Domestic
Japan: Japan is historically relevant as the attacker at Pearl Harbor, but not directly affected by the renaming.
United States — United States Department of Defense: The DoD is overseeing the renaming effort and broader DEI-related name changes, affecting its reputation and policy direction.
Aug 21, 2026 · 6 articles
Domestic
Japan: Japan was the nation responsible for the attack on United States — Pearl Harbor in 1941, which led to the deaths of the servicemen whose remains are now being identified.
United States — United States Department of Defense: The United States — United States Department of Defense oversees the United States — Defense POW/MIA Accounting Agency, which is conducting the identification effort.
Mar 06, 2026 · 6 articles
International
Japan: Japan was mentioned by North Korea as pursuing nuclear weapons under US protection.
United States — United States Department of Defense: Pentagon reportedly considered options to punish NATO allies, including suspending Spain.
Apr 20, 2026 · 160 articles
International
Japan: Destination for some oil; affected by shipping disruptions.
United States — United States Department of Defense: Estimated war cost at $37.5 billion; requested additional funding.
Mar 09, 2018 · 462 articles
Business
Japan: Japan's Nikkei 225 was volatile but slightly up.
United States — United States Department of Defense: The Pentagon designated ChangXin Memory Technologies as a Chinese military company, adding geopolitical risk.
Jul 14, 2026 · 113 articles
International
Japan: Japanese markets rose.
United States — United States Department of Defense: The Pentagon did not comment on the pause but is involved in military planning. Spokesman Parnell stated the military has everything it needs.
Jul 08, 2026 · 472 articles
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