Japan Is Quietly Becoming a Major Military Power Again by 2035

The Question

For nearly eighty years, Japan defined itself by what it would not do. Article 9 of its postwar constitution renounces war as a sovereign right and the threat or use of force to settle disputes. Its armed forces were named the Self-Defense Forces to underline the point, and defense spending sat for decades near an informal ceiling of 1% of national output. Then, in December 2022, Tokyo adopted three landmark security documents — including a new National Security Strategy — that authorized "counterstrike" capability, the ability to hit enemy missile bases, and set a course to raise defense spending to 2% of GDP.

Two percent may sound modest. Applied to the world's fourth-largest economy, it is not: it pushes Japan's defense budget past $60 billion, into roughly third or fourth place globally. The question this forecast weighs is whether the buildup continues to its logical end — Japan as one of the five most capable military powers on Earth by 2035 — or stalls under the weight of debt, demographics, and lingering public caution.

What the Evidence Shows

The money is already moving. The 2022 strategy came with a ¥43 trillion five-year spending plan, and the 2% of GDP target — originally set for fiscal 2027 — was accelerated and reached around fiscal 2025–26. Hardware is following: Japan is buying up to 400 US Tomahawk cruise missiles and upgrading its homegrown Type-12 missiles to strike targets roughly a thousand kilometers away — weapons that would have been politically unthinkable a generation ago.

The transformation runs deeper than missiles. Japan plans a fleet of about 147 F-35 stealth fighters, including F-35B jump jets that fly from its Izumo-class helicopter destroyers — ships now converted into light aircraft carriers in all but name. With Britain and Italy, it is developing a sixth-generation fighter under the Global Combat Air Programme, targeting service by 2035, and in March 2024 it eased export rules so the jet can be sold abroad — a historic break for a country that long banned most arms exports outright.

None of this abolishes Japan's pacifism on paper. Article 9 still renounces war; a 2015 reinterpretation allows "collective self-defense" — fighting alongside an ally under attack — within strict limits. And the buildup is happening inside the US alliance, not away from it: Washington and Tokyo upgraded their command relationship in 2024, and Japan stood up a new joint operations headquarters designed to fight, if ever needed, as one force with the Americans.

Why This Is Happening

China's shadow lengthens daily. Chinese government vessels patrol near the Japanese-administered Senkaku Islands almost continuously, and Beijing's rapid military modernization — plus the prospect of a Taiwan crisis on Japan's doorstep — has convinced Tokyo that its neighborhood is turning dangerous. Japan's own defense white papers now describe the security environment in strikingly blunt language.

North Korea and Russia sharpen the fear. Pyongyang has fired ballistic missiles over Japanese territory, sending residents scrambling for shelter alerts. Russia's full-scale invasion of Ukraine showed that wars of conquest are back — and Moscow, a neighbor with which Japan has a decades-old island dispute, exercises its forces near Japanese waters.

Washington wants a stronger partner — and Tokyo is hedging. The United States, stretched across multiple theaters, has long pressed allies to carry more weight. Japanese planners also quietly ask what happens if American attention wavers. Building real capability answers both concerns at once: it strengthens the alliance while insuring against its limits. The alliance itself is being rewired to match — in 2024, Washington and Tokyo announced the largest upgrade to their command arrangements in decades, and Japan stood up a new joint operations headquarters to direct its ground, maritime, and air forces as a single fighting organization.

What Could Happen

What Can We Do

Japan's choices will reshape Asia's balance of power whether or not the wider world pays attention. Watching them well matters more than most people realize.

Read the change accurately. Japan is not tearing up its pacifist identity; it is reinterpreting it under pressure, within its constitution and alliance. Grasping the difference between alliance-embedded deterrence and runaway militarism keeps public debate — in Japan and abroad — anchored in facts rather than the ghosts of the 1930s.

Watch the recruitment numbers, not just the budgets. A military is ultimately people, and Japan's population is shrinking and aging. Whether automation, unmanned systems, and better pay can offset a thinning pool of recruits is the single best indicator of whether the 2035 goal is realistic.

Follow the GCAP fighter as a bellwether. The joint jet with Britain and Italy tests everything at once: Japan's technology, its export politics, and its ability to co-lead a major international program. If GCAP stays on track for 2035, the broader forecast almost certainly is too.

Support transparency and regional dialogue. A rearming Japan alongside a rising China is precisely the setting where miscalculation thrives. Crisis hotlines, published defense white papers, and military-to-military talks are what keep a stabilizing buildup from curdling into a destabilizing arms spiral.