The $500 Million FMF for Taiwan Leaves a Gap in Japan's Southwest Defense

There is a small photo showing citizens lining up in front of an AH-64E Apache, which was publicly displayed at the National Defense University in Taipei on July 25. More than the flashy aircraft, what caught my attention was that just a few days earlier, the U.S. House of Representatives included $500 million in Foreign Military Financing (FMF) for Taiwan in the fiscal year 2027 spending bill. According to Defense News, the Trump administration still holds back a new $14 billion Taiwan arms package, but Congress is attempting to push back at least the fulfillment of previously approved amounts.

$500 Million Looks Large but Is Small

The $500 million is clear as a political signal. However, it is limited in terms of military fulfillment. As of April, there are said to be 30 types of unfulfilled items on Taiwan's side, including the recently approved M109A7 self-propelled howitzers, HIMARS, Javelin anti-tank missiles, and unmanned attack drone systems. FMF is a means of payment and does not automatically create approvals for sales or availability on production lines. Misunderstanding this difference could lead to an overestimation of the initial deterrence in the event of a Taiwan crisis.

Delays in Taiwan Support from the Southwest Islands Perspective

The issue for Japan is not the equipment list for Taiwan itself, but the timeline. As asymmetric equipment like HIMARS and Javelins reach Taiwan, the People's Liberation Army will be constrained by more troops and firepower at the Strait front. Conversely, if deliveries are delayed, the Chinese Coast Guard and Navy will gain the leeway to disperse pressure around eastern Taiwan, Yonaguni Island, and the Miyako Strait. This directly relates to the Japan Maritime Self-Defense Force's (JMSDF) defense of SLOCs (Sea Lines of Communication).

In mid-July, another report indicated that Chinese Coast Guard vessels continued long-term patrols about 54 nautical miles east of Taiwan, and that China had launched submarine-launched ballistic missiles from the South China Sea into the Pacific. While the activities of the white-hulled Coast Guard and the strategic missile tests are of different natures, both are acts that gauge the decision-making speed of the allies. Even if Japan's Ministry of Defense enhances missiles, drones, and surveillance in the southwest, if there is a gap in ammunition and sensors for Taiwan, the first island chain will not become stronger as a whole.

What Japan Should Observe in Alliance Practices

In discussions about the U.S.-Japan alliance, the presence or absence of U.S. military intervention often takes center stage. However, from the perspective of the Japan Maritime Self-Defense Force, the issues that surface more quickly are supply, maintenance, ammunition distribution, and information sharing. If the U.S. supports Taiwan, Guam, Okinawa, and the Philippines simultaneously, ships equipped with Mk 41, aviation fuel, PAC-3, anti-ship missiles, and drone parts will compete for the same rear support network.

The $500 million FMF demonstrates the U.S. Congress's commitment to Taiwan's defense. However, deterrence is established not only by will but also by timelines.

In my view, what Japan should be questioning now is not the strength of U.S. commitments. Rather, it is the priority of which missions the Self-Defense Forces in the southwest islands will take on if the equipment for Taiwan is delayed. The most dangerous thing is not misreading China's intentions, but reading the logistics plans of allies too optimistically.

Major Information Sources

• Defense News, July 27, 2026, U.S. Congress approves money for Taiwan defense
• Defense News, July 15, 2026, China coast guard patrols east of Taiwan and SLBM test analysis
• Defense News, May 29, 2026, U.S. arms sales pause and Taiwan asymmetric defense