Japan met the 2 per cent pledge early and will not name the number that follows

Japan's revised national security documents are due by the end of 2026, and the number everyone expected them to carry may not be in them. Nikkei reported on 24 September that Prime Minister Sanae Takaichi has become increasingly reluctant to commit to a defence spending target expressed as a share of gross domestic product and to be reached within five years, because Tokyo judges the 3.5 per cent level sought by the Trump administration unlikely to be attained in that period. A year earlier the same prime minister had made her name on exactly such a number. The question is what replaces it.

Who governs, and on what the defence pledge rested

Takaichi won the Liberal Democratic Party presidency on 4 October 2025 and took office later that month. Her opening commitment on defence was to timing rather than scale: Nikkei reported on 24 October 2025 that in her first policy address she undertook to lift defence spending to 2 per cent of GDP by the end of the fiscal year closing in March 2026, two years ahead of the schedule inherited from the Kishida government, and said this could be done without raising taxes. The acceleration was announced as President Trump prepared to visit Japan.

That pledge concerned one budget year, not the trajectory after it. Whether the outturn for the year to March 2026 actually cleared 2 per cent is not established in the sources available here, and matters less than what the pledge revealed: the line was reached by moving money forward, a manoeuvre that works once. On 4 October 2026 Takaichi was due to open an extraordinary Diet session with a policy speech, according to Nikkei's week-ahead listing; the security documents, not the speech, are where a commitment would have to be written down.

The gap between the demand and the request

The American ask is explicit. The Japan Times reported on 15 September, under the headline "Japan considers defense spending worth 3.5% of GDP after U.S. pressure", that Tokyo was weighing a target at that level; its 7 September piece was headlined "As U.S. demands more, Japan may need to get creative with defense spending". Nikkei's 24 September report is the answer to both: the level is not thought reachable on Washington's timetable.

The budget request sits well below it. The Japan Times reported on 20 August that the Defense Ministry would seek a record 8.9 trillion yen for fiscal 2027. A record request that still leaves a wide gap to 3.5 per cent is the arithmetic behind Takaichi's caution, and financing compounds it. The Japan Times reported on 28 September that a government adviser argued higher defence spending would not unsettle markets; the assurance indicates the concern is live. Nikkei reported on 2 October that Takaichi had disavowed reflation as Washington pressed for a change of policy on the yen. A government lobbied on its currency and watching its own bond market has limited appetite for a ten-year ratio in a published strategy.

Capability announcements instead of a ratio

What Tokyo is producing instead is a run of specific, fundable decisions, two of them inside the past week.

On 3 October Nikkei reported that Japan will develop a low-cost, long-range cruise missile intended for production in quantity, to saturate and deplete an adversary's air defences. The design point is price: the report contrasts it with the Tomahawk, which costs over 2 million dollars per unit, and says the new weapon will use civilian-grade components. That is a different theory of deterrence from the one a spending ratio implies: magazine depth rather than budget share.

On 30 September Nikkei reported that the government plans to set up a state investment organisation for defence startups as early as the fiscal year beginning in April 2027, to put money into early-stage firms and to channel exports of advanced dual-use technology, with drones identified as the priority. The model named is the US Foreign Military Sales programme, an export mechanism rather than only a procurement one. Both measures fit a government that intends to raise defence output while keeping the headline number out of a binding document.

The alliance bill arrives in other currencies

The spending argument is not the only item on the Japan-US account, and the others moved in the same fortnight. Nikkei reported on 19 September that Takaichi sought a meeting with Trump in New York to keep Washington engaged on deterring China before the president's planned summit with Xi Jinping; its 23 September piece was headlined "Japan-China ties wither as Trump readies red carpet for Xi Jinping". On 4 October Nikkei reported that Takaichi had protested to the United States over the arrest of a US Marine in connection with a killing in Okinawa, the recurring domestic constraint on alliance basing, surfacing when Tokyo needs American goodwill on numbers.

Russia policy moved too. Nikkei reported on 3 October that Japan had sanctioned Russia's shadow fleet, its first such measure since President Putin's visit to one of the disputed islands, and noted concern that Moscow could retaliate through energy supply. That is a deliberate choice to accept energy risk for alignment, taken by the same government declining to accept a fiscal commitment for the same purpose.

What to watch

• Whether the revised National Security Strategy, National Defense Strategy and Defense Buildup Program, due by the end of 2026, contain a GDP ratio at all, and over what horizon.
• What the Defense Ministry's 8.9 trillion yen fiscal 2027 request becomes in the year-end budget decision, and whether the increment is weighted to munitions volume.
• Whether the defence startup fund is stood up on the April 2027 timetable, and whether its export function is used.
• Whether Washington accepts capability commitments in place of a percentage, or presses the ratio again after the Trump-Xi meeting.

The 2 per cent target was a scheduling decision dressed as a strategic one. Declining to set the next ratio is the more honest position, and a harder one to explain to an ally that measures allies by it.

Sources

• Nikkei Asia — Japan's Takaichi grows cautious of setting GDP defense spending target
• Nikkei Asia — Japan PM Takaichi vows to boost defense spending to 2% of GDP by March
• Nikkei Asia — Takaichi seeks Trump meeting early next week ahead of US-China summit
• Nikkei Asia — Japan to develop low-cost cruise missile that overwhelms air defenses
• Nikkei Asia — Japan to create state investment fund for defense startups, eyeing more drones
• Nikkei Asia — Defense section index (headlines and dates, 15 September to 3 October 2026)
• Nikkei Asia — Politics section index (headlines and dates, 2 to 4 October 2026)
• The Japan Times — Japan considers defense spending worth 3.5% of GDP after U.S. pressure
• The Japan Times — As U.S. demands more, Japan may need to get creative with defense spending
• The Japan Times — Higher defense spending won't unsettle markets, government adviser says
• The Japan Times — Defense Ministry to seek record 8.9 trillion yen in fiscal 2027 budget
• The Japan Times — Japan to begin full-scale security strategy review in spring