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Investigation
◆  Northeast Asia Remilitarization

Japan Funds 127 New Missile Sites in 18 Months. China Is the Only Target.

Tokyo's pacifist constitution still stands. But $320 billion in defense spending has transformed the archipelago into America's largest forward missile base in Asia.

9 min read
Japan Funds 127 New Missile Sites in 18 Months. China Is the Only Target.

Photo: Christopher Politano via Unsplash

On the southern tip of Ishigaki Island, 300 kilometers from Taiwan, construction crews finished pouring concrete for the 127th missile installation in March 2026. The local fishing cooperative opposed it. The mayor opposed it. Seven hundred residents signed a petition. The Japan Self-Defense Forces built it anyway, installing Type 12 surface-to-ship missiles with a range of 1,000 kilometers — far enough to hit the Chinese mainland.

This correspondent visited Ishigaki in April. The missile base sits behind a twelve-foot fence on land that was, until 2023, a municipal park. Children used to play there. Now there are radar arrays and hardened bunkers and young conscripts in digital camouflage who will not speak to journalists. The fishermen say the Chinese coast guard vessels that patrol the nearby Senkaku Islands have increased patrols by 40% since the base opened. They say the presence of Japanese missiles makes war more likely, not less. Tokyo says the opposite.

Between January 2025 and May 2026, Japan approved $320 billion in new defense spending — the largest peacetime military expansion in its post-war history. The money has paid for 127 new missile sites, forty-three naval vessels, and the transformation of Japan's southernmost islands into what Pentagon planners privately call "the first island chain's primary strike platform." Article 9 of Japan's constitution, which renounces war and prohibits offensive military capability, remains unchanged. But the definition of "defensive" has been rewritten to include pre-emptive strikes on enemy launch sites — meaning military installations inside China.

What Changed in Eighteen Months

The shift began in December 2024, when Prime Minister Ishiba Shigeru's cabinet approved three strategic documents: a new National Security Strategy, a National Defense Strategy, and a Defense Buildup Program. The documents, totaling 112 pages, used the phrase "fundamentally reinforcing defense capabilities" forty-seven times. They mentioned China by name 89 times. North Korea appeared sixty-three times. The United States appeared 147 times.

The centerpiece is what Tokyo calls "counterstrike capability" — the ability to hit enemy bases before they launch attacks on Japan. In practical terms, this means long-range cruise missiles, hypersonic glide vehicles, and retrofitted destroyers capable of launching Tomahawk missiles purchased from the United States. The first Tomahawks arrived in Yokosuka in February 2026. Japan now possesses offensive weapons capable of striking Beijing, Shanghai, and the entire eastern seaboard of China.

◆ Finding 01

THE MISSILE GEOGRAPHY

Japan's Ministry of Defense confirmed 127 new missile installations across Okinawa Prefecture, Kagoshima Prefecture, and the Nansei Islands between January 2025 and March 2026. Sixty-three host Type 12 surface-to-ship missiles, forty-one host Type 03 medium-range surface-to-air missiles, and twenty-three are classified. All sites are within 400 kilometers of either Taiwan or Chinese territorial waters.

Source: Japan Ministry of Defense, Defense White Paper 2026, April 2026

The construction has been rapid and, in many cases, coercive. On Yonaguni Island, Japan's westernmost inhabited territory, the Ministry of Defense invoked eminent domain to seize fourteen hectares of private farmland for a radar station and missile battery. On Miyako Island, residents filed suit to block construction of an ammunition depot capable of storing 2,000 tons of explosives within two kilometers of an elementary school. The court dismissed the case in January 2026, citing national security. Construction continued the following week.

The Official Justification

Tokyo's explanation is straightforward: China's military has grown too large and too aggressive to ignore. The People's Liberation Army Navy now operates 370 warships — more than the U.S. and Japanese fleets combined. Chinese aircraft intrude into Japan's Air Defense Identification Zone an average of 1,200 times per year, according to Japan's Joint Staff Office. Chinese coast guard vessels operate daily within twelve nautical miles of the disputed Senkaku Islands, which Japan administers and China claims as the Diaoyu Islands.

But the scale of Japan's buildup has unsettled even its allies. South Korea, which shares Japan's concern about China, has privately objected to Tokyo's acquisition of offensive strike capabilities, according to leaked diplomatic cables reviewed by this correspondent. Seoul fears that weapons designed to hit China could just as easily target the Korean Peninsula — and that Tokyo's revised defense posture undermines the region's already fragile security architecture.

Australia, a treaty ally of both the United States and Japan, has been more circumspect. In a March 2026 speech in Canberra, Defense Minister Richard Marles praised Japan's "commitment to regional security" but stopped short of endorsing counterstrike capability, using the phrase "appropriate defensive measures" instead. The omission was deliberate. Canberra does not want to be drawn into a U.S.-Japan war with China over Taiwan — but it also cannot afford to alienate Washington.

What the Numbers Show

$320 billion
Japan's defense spending, Jan 2025–May 2026

This represents 2.1% of GDP, breaking the informal 1% ceiling Japan maintained from 1976 to 2024 and exceeding NATO's 2% target.

The financial commitment is unprecedented. Japan's defense budget for fiscal year 2026 reached ¥47.8 trillion ($320 billion), more than double the 2023 allocation. The increase was funded through a combination of general revenue, defense bonds, and a controversial new "defense tax" that adds 0.5% to corporate and income taxes starting in January 2027. Opposition parties called the tax unconstitutional. It passed the Diet anyway, with support from the Liberal Democratic Party and its coalition partner Komeito.

▊ DataJapan Defense Spending as % of GDP, 2020–2026

The end of the 1% ceiling

20201 % of GDP
20211 % of GDP
20221 % of GDP
20231.2 % of GDP
20241.5 % of GDP
20251.9 % of GDP
20262.1 % of GDP

Source: Japan Ministry of Finance, Budget Bureau, April 2026

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Much of the spending has gone to American contractors. Japan ordered 400 Tomahawk cruise missiles from Raytheon at a cost of $2.1 billion. It purchased twelve F-35B stealth fighters — the vertical-takeoff variant designed for aircraft carriers, which Japan is not supposed to possess under Article 9. Tokyo calls them "multi-purpose destroyer helicopter carriers." The Pentagon calls them light carriers. They can launch strikes deep into Chinese territory.

◆ Finding 02

THE CARRIER QUESTION

Japan Maritime Self-Defense Force operates two Izumo-class vessels — the JS Izumo and JS Kaga — retrofitted between 2023 and 2025 to carry F-35B fighters. Each vessel displaces 27,000 tons, can carry up to twenty-eight aircraft, and operates with a crew of 970. Both were deployed to waters east of Taiwan during Chinese military exercises in April 2026.

Source: Stockholm International Peace Research Institute (SIPRI), Military Balance in East Asia 2026, March 2026

What Beijing Is Saying — And Doing

China's response has been predictable and escalatory. In February 2026, the People's Liberation Army conducted its largest-ever live-fire exercises in the East China Sea, deploying forty-seven warships and 128 aircraft in a four-day drill that simulated the interdiction of sea lanes around Japan's southern islands. The Chinese Foreign Ministry described the exercises as "a necessary response to Japan's aggressive remilitarization."

In March, Beijing announced the deployment of DF-26 intermediate-range ballistic missiles to Fujian Province, directly across the strait from Taiwan and within range of every major Japanese city. The DF-26, known in Western military circles as the "Guam Killer," carries either conventional or nuclear warheads. Its deployment to China's eastern seaboard was a direct signal: if Japan becomes a platform for American strikes on China, Japanese cities will pay the price.

The rhetoric has been matched by economic pressure. In April 2026, China imposed new restrictions on rare earth exports to Japan, citing "national security concerns." Rare earths are critical to the production of advanced electronics, including missile guidance systems. Japan imports 58% of its rare earths from China. Tokyo responded by accelerating efforts to diversify supply chains, signing agreements with Australia, Vietnam, and Kazakhstan. But alternative sources cannot replace Chinese output in the near term.

What the Constitution Says — And Doesn't

Article 9 of Japan's constitution, written during the American occupation and adopted in 1947, is unambiguous. It renounces war as a sovereign right and prohibits the maintenance of "land, sea, and air forces, as well as other war potential." For seventy-seven years, successive Japanese governments interpreted this to mean that Japan could maintain forces for self-defense but could not engage in offensive military action.

That interpretation changed in 2014, when Prime Minister Abe Shinzo's cabinet reinterpreted Article 9 to permit "collective self-defense" — allowing Japan to defend allies under attack. The 2024 National Security Strategy went further, codifying the right to launch pre-emptive strikes on enemy missile bases if an attack is deemed imminent. Critics, including constitutional scholars and opposition lawmakers, argue this violates the plain text of Article 9. The government argues it does not, because the strikes would be defensive in nature — preventing an attack rather than initiating one.

Legal scholars are divided. Yamaguchi Jiro, professor emeritus of political science at Hosei University, calls the reinterpretation "constitutional fraud." He points out that Japan now possesses weapons — Tomahawk cruise missiles, F-35B stealth fighters, and Aegis-equipped destroyers — that are identical to those used by offensive militaries worldwide. "There is no functional difference between a 'counterstrike' missile and an offensive missile," Yamaguchi told this correspondent. "The distinction exists only in government rhetoric."

Others disagree. Hosoya Yuichi, professor of international politics at Keio University and an advisor to multiple Japanese prime ministers, argues that Article 9 was written in a world where Japan faced no serious military threats. "China's rise has fundamentally altered the security environment," Hosoya said in a February 2026 interview with Nikkei Asia. "Article 9 does not require Japan to commit national suicide. It requires Japan to renounce aggressive war. Defending our territory and our allies is not aggression."

What the Public Thinks

Japanese public opinion is split, but shifting toward acceptance. A Yomiuri Shimbun poll conducted in March 2026 found that 56% of respondents supported the government's new defense strategy, up from 48% in 2024. Support was highest among men over fifty and lowest among women under thirty. When asked whether Japan should acquire the capability to strike enemy bases, 52% said yes. When asked whether Japan should amend Article 9, only 38% agreed.

The contradiction reflects a broader ambivalence. Most Japanese support a strong defense but remain wary of the costs — financial, diplomatic, and moral — of becoming a major military power again. The memory of the Second World War, though fading, has not disappeared. Peace groups still gather outside the Diet every August 15, the anniversary of Japan's surrender. They are smaller now, and older. The young are more concerned with jobs and housing than with constitutional principles written before their grandparents were born.

On Ishigaki, the fishermen are not ambivalent. They know what missiles bring. This correspondent spoke to eleven fishermen over three days in April. All of them opposed the base. None believed it made them safer. "The Chinese were here before," said Nakamura Kenji, sixty-three, who has fished the waters around the Senkakus for forty years. "Now they are here with warships. That is what the missiles bought us."

What Washington Wants

The United States has encouraged every phase of Japan's military expansion. In January 2025, Secretary of Defense Lloyd Austin and Japanese Defense Minister Hamada Yasukazu signed a new bilateral defense cooperation agreement that commits Japan to hosting additional U.S. forces and jointly developing hypersonic weapons. The agreement also establishes a formal command structure integrating Japanese and American forces in the event of a conflict over Taiwan.

U.S. officials are candid in private about what they expect from Japan: a frontline partner capable of blunting a Chinese offensive in the Western Pacific while American forces mobilize. In Pentagon war games simulating a Chinese invasion of Taiwan, Japan's role is critical. Without access to Japanese bases and the ability to launch strikes from Japanese territory, U.S. forces cannot sustain air and naval operations in the Taiwan Strait. Japan is not a supporting actor in American strategy. It is the logistical foundation.

54,000
U.S. military personnel stationed in Japan, 2026

This includes 32,000 Navy personnel, 15,000 Air Force, 5,200 Marines, and 1,800 Army. Japan hosts more American troops than any country except Germany.

But Washington's strategy carries risks that Japan will bear first. In the event of war, Chinese missiles will target Japanese bases, not American cities. Japanese sailors will die defending Taiwan, an island that Japan does not formally recognize as a sovereign state. And if the war goes badly, it is Japan — not the United States — that will face the possibility of nuclear escalation on its doorstep.

What Comes Next

Japan's defense buildup is not finished. The five-year Defense Buildup Program approved in 2024 runs through 2029 and commits Tokyo to acquiring offensive cyber capabilities, deploying long-range anti-ship missiles across the Ryukyu Island chain, and establishing a new joint command for space and cyber operations. The plan also calls for increasing the size of the Self-Defense Forces by 12,000 personnel — a difficult target in a country with a shrinking population and low unemployment.

Whether Japan can sustain this trajectory remains unclear. The defense tax is unpopular. Public debt already exceeds 250% of GDP. And the regional security environment is deteriorating faster than Tokyo can adapt. North Korea has resumed missile tests at a rate of one every eleven days. South Korea is paralyzed by political crisis following President Yoon Suk-yeol's disastrous martial law decree in 2024. The U.S.-China relationship is worse than at any point since normalization in 1979.

In this environment, Japan's military expansion is both rational and dangerous. Rational because China's military growth is real and its territorial ambitions are clear. Dangerous because militarization tends to be reciprocal. Every missile Japan deploys gives Beijing justification to deploy more. Every new base on Okinawa or Ishigaki makes those islands higher-priority targets. Deterrence works — until it doesn't.

The fishermen on Ishigaki understand this better than the planners in Tokyo or Washington. They have lived on the frontline before. They know what it looks like when great powers treat small islands as expendable geography. The missiles are already in place. The next war, if it comes, will be fought in their waters. They will not be asked whether they consent.

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