Our position: Japan is the most capable and most exposed ally the United States has in Asia, and Washington should treat it that way. Here is the evidence, then the strongest case against.

The pressure is real and it is constant

Japan’s own 2026 defense white paper says the world faces its greatest trial since World War II. It calls China the greatest strategic challenge Japan has faced and lists a roughly 30-minute radar lock on a Japanese aircraft in December 2025. At the Senkakus, Chinese coast guard ships stayed in the surrounding zone for a record 335 straight days, ending in October 2025, well past the previous record of 215.

Then came the economic squeeze. After Prime Minister Sanae Takaichi said last November that an attack on Taiwan could threaten Japan’s survival, Beijing on Jan. 6 banned dual-use exports to Japan, including rare earths and magnets. Japan got 63% of its rare earth imports from China in 2024. In February China named two lists of 20 Japanese firms for bans or case-by-case licensing. As of early September, an East-West Center analyst describes ties as a persistent negative spiral, with the penalties still in place.

The other threats stack on top. North Korea fired its 16th ballistic missile launch of the year on Oct. 3, per South Korean reporting, and Tokyo, Seoul and Washington held a call the same day. On June 27, Chinese and Russian bombers flew a joint patrol around Japan, the first of 2026. Japan’s white paper says North Korea poses a more grave and imminent threat than ever.

Japan is paying its own way

Tokyo’s FY2026 budget topped 9 trillion yen, up 9.4%, and the government said it would hit 2% of GDP by March 2026, two years early. It includes more than 970 billion yen for standoff missiles, among them an upgraded Type-12 with a range of about 1,000 km. The FY2027 request is another record, 8.9 trillion yen (about $55.6 billion), covering long-range strike, drones and new air defenses. The final figure is usually higher than the request.

The alliance machinery is catching up. Japan stood up its Joint Operations Command in March 2025, and the Pentagon began upgrading US Forces Japan to work with it. By July the US command had added about 215 personnel and was building a bilateral coordination center. The US military also has a shipyard problem. In 2024 the two governments launched a joint effort to let Japanese yards repair US warships, with nuclear submarines and carriers excluded. That is capacity the US cannot build quickly at home. Japan is also a chip and materials power, but we could not verify current fab and shipbuilding figures to our standard for this draft, so we leave them out.

Politics is stable too. Takaichi kept her defense, foreign and trade ministers in a Sept. 17 reshuffle, which is rare continuity among allies.

The strongest case against

Burden-sharing. Washington keeps asking for more. Bloomberg reported on Sept. 15, as relayed by Semafor, that Japan is weighing a 3.5%-of-GDP target after US pressure. Skeptics say a rich ally should have moved sooner.

Limits at home. Japan’s population is shrinking, its constitution still constrains offensive force, and the government is straining to fund the buildup. The AFP report on the reshuffle notes bond yields near 3%, a three-decade high, and a weak yen.

Escalation risk. Deeper integration can pull the US into a fight over islands or Taiwan that Washington may not want. The same analyst who tracks the coercion says the US has not publicly backed Japan in this dispute, and reports that President Trump urged Takaichi in November not to antagonize Beijing. That is one opinion piece’s account, not something we have confirmed.

Friction on the ground. On Oct. 4 Foreign Minister Motegi protested the arrest of a US Marine in Okinawa on suspicion of robbery-murder. Basing costs and incidents wear on public support.

Our read: these are reasons to manage the alliance well, not to hedge on it. Japan is doing the things allies are asked to do, and it is doing them under direct pressure. Washington’s ambiguity is the bigger risk.

What to watch

Whether Japan’s revised security documents, due in 2026, raise the spending target. Whether Beijing answers Takaichi’s expected Oct. 5 call for a “stable” relationship by easing the export bans, or only with words (AFP, via Malay Mail, previewed the speech from draft reports; we did not confirm the delivered text). Whether the US says anything on the record about Japan’s side of the dispute. Read the claim against the milestone, not the speech.

Sources

• Japan Ministry of Defense, Defense of Japan 2026 (digest)
• Stars and Stripes, Chinese coast guard ends record 335-day stay near Japan’s Senkaku Islands
• CSIS, China’s Rare Earth Campaign Against Japan
• East Asia Forum, China’s economic coercion strengthens Takaichi’s hand
• Asia Times, China’s pressure campaign against Japan is backfiring badly
• The Pioneer, North Korea fires ballistic missile toward East Sea, 16th launch this year
• Japan MOFA, Japan-U.S.-ROK Foreign Ministries’ Official Telephone Meeting on North Korea
• USNI News, Russia, China Fly Joint Bomber Missions Near Japan, South Korea
• Defense News (AP), Japan’s Cabinet OKs record defense budget that aims to deter China
• USNI News, Japan Budget Requests Record $55.6B for Unmanned, Long Range Strike Capabilities
• Army.mil (DOD News), Defense secretary announces US Forces Japan’s upgrade to joint force command
• Stars and Stripes, US Forces Japan general says command overhaul already paying dividends
• Aviation Pros (Stars and Stripes), US, Japan Plan Joint Ship and Aircraft Repair, Missile Production and Logistics
• Courthouse News (AFP), Japan’s Takaichi keeps key ministers in cabinet reshuffle
• Semafor, Japan considers boosting defense spending to 3.5% of GDP
• Japan MOFA, Foreign Minister Motegi’s protest to US Ambassador Glass (Oct. 4)
• Malay Mail (AFP), Japan PM Takaichi to seek stable ties with China after Taiwan remarks sent relations to rock bottom

Facts last verified: October 10, 2026, 5:55 AM Pacific