Japan Weighs ¥80 Trillion Defense Plan: Where the Money Goes

TOKYO, Nov. 2, 2026 — Japan’s government and ruling coalition are considering a five-year defense plan worth ¥70 trillion to ¥80 trillion ($457 billion to $508 billion) from April 2027, two people familiar with the matter told Reuters, as published by The Japan Times. The top of that range is about 1.8 times the roughly ¥43 trillion in the current plan, which began in fiscal 2023. Japan’s Defense Ministry said it had no comment.

The higher figure was also reported by the Sankei Shimbun, which reported that the ministry had estimated its needs at about ¥80 trillion. Because funding is limited, the paper said, government talks are expected to settle in the upper ¥70 trillion range after procurement plans are reviewed. Neither number is final. Both depend on the year-end rewrite of Japan’s three security documents: the National Security Strategy, the National Defense Strategy and the Defense Buildup Program.

What the new plan would pay for

According to the Sankei, the ministry wants more money for a “SHIELD” concept that would field large numbers of air, sea and ground drones, for artificial intelligence and cloud systems, and for the space and cyber domains, which the paper said are lagging. It also listed ammunition, spare parts, repairs to aging facilities, and transport and supply capacity. One of the Reuters sources said the extra money would buy “large numbers of drones” and that a weaker yen had raised the cost of buying equipment.

The plan would replace the current program a year early. The ministry’s own fiscal 2027 budget request, released Aug. 31, already pointed that way. It priced only work under the existing program, about ¥9 trillion on an expenditure basis, and listed items tied to the document revision as “matter requests” with no amount attached. It quoted the Cabinet’s July 21 economic policy, which says Japan will “realize the transformation of defense capabilities within five years.”

How far the current plan has run

The ministry tracks the current plan across 15 spending areas on a contract basis, which totals ¥43.5 trillion. Peter’s World added up the contract amounts the ministry lists for fiscal 2023 through 2026, using its March 2026 budget document, and compared them with each area’s five-year allotment. The percentages are our arithmetic; the yen figures are the ministry’s.

Four of five years have been contracted, and 80% of the money is committed, so the program is broadly on pace. The spread underneath is wider. Air and missile defense has already passed its five-year allotment, while space and unmanned systems have used about two-thirds or less. Unmanned contracts jumped in fiscal 2026 to ¥277 billion, more than the previous two years combined.

The scale in context

The current plan was itself a step change. Drafted at the end of 2022, it sharply raised planned spending from an initial allocation of ¥27.5 trillion, according to Reuters. Its text, in the ministry’s English translation of the Defense Buildup Program, sets expenditure at “approximately ¥43 trillion” for fiscal 2023 to 2027 and assumes annual budgets of about ¥8.9 trillion by the final year.

Spread evenly, ¥80 trillion over five years would average ¥16 trillion a year, against ¥8.6 trillion a year under the current plan. Even the ¥70 trillion floor would mean about ¥14 trillion a year. For comparison, the ministry’s fiscal 2026 budget for defense-related expenditures is ¥8.81 trillion, or ¥9.04 trillion including costs tied to the SACO agreement on Okinawa and the realignment of U.S. forces.

Analysis: a drone-first plan, and the bill behind it

The table puts the early revision in context. With 80% of contracts let after four years and the largest air-defense line already overspent, the current plan has little room left for the drone-heavy force the ministry now describes. Two of the least-used lines, space and unmanned systems, match the priorities the Sankei listed for the next plan. Cyber is the exception: in money terms it is nearly fully committed, so any “lagging” there is a matter of capability, not unspent budget.

The alliance angle matters in Washington. A Congressional Research Service report on U.S.-Japan relations notes that Prime Minister Sanae Takaichi pledged to reach 2% of GDP by April 2026, two years earlier than planned, which CRS attributes to ongoing concerns about Chinese activity. It also records that Japan is buying the Tomahawk Weapon System for about $2.35 billion and received its first missiles in March 2026. The ministry says the government brought the 2% goal forward to fiscal 2025, combining initial and supplementary budgets. A plan of ¥70 trillion or more would push well past that benchmark.

The constraint is money. The Sankei said finance limits are already pulling the number below ¥80 trillion. A second Reuters source said the final figure could land in the mid-to-late ¥70 trillion range but questioned whether that would be enough, given the security environment in East Asia. Politics may also bite: CRS notes that the coalition holds a Lower House supermajority but is a minority in the Upper House, which could complicate its agenda. How Tokyo pays for the plan, through taxes, bonds or cuts elsewhere, is likely to be the harder fight in the year-end talks.

What to watch

• The Cabinet’s year-end approval of the three revised security documents and the final five-year figure.
• Whether the fiscal 2027 budget, now listed at about ¥9 trillion plus unpriced items, rises toward ¥10 trillion or more.
• How the funding mix is decided, including any new tax measures.

Sources

• The Japan Times (Reuters): Japan weighs $500 billion defense spending plan, sources say (Nov. 2, 2026)
• Sankei Shimbun: Defense Ministry estimates ¥80 trillion over five years (Nov. 2, 2026)
• Japan Ministry of Defense: Progress and Budget in Fundamental Reinforcement of Defense Capabilities, FY2026
• Japan Ministry of Defense: FY2027 budget request overview (Aug. 31, 2026)
• Japan Ministry of Defense: Defense Buildup Program (2022, English)
• Congressional Research Service: U.S.-Japan Relations, IF10199 (March 26, 2026)

Additional sources

• Asia Today: Japan’s next five-year defense outlay estimated at nearly double current plan, Nov. 2, 2026 (describes SHIELD as a coastal drone, surface-vessel and underwater-vehicle network, and says the 2026 Defense White Paper set fiscal 2027 as the target for establishing it)

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