Japan’s record 2026 defence outlay signals a recalibration of strategic priorities in an increasingly volatile regional security environment
Japan approved a record defence budget of approximately JPY8.9 trillion (about US$58 billion) for fiscal year 2026, marking the 12th consecutive year of increases and underscoring persistent strategic concerns in the Indo-Pacific. The budget—revised upward from an initial JPY8.8 trillion allocation approved earlier—was cleared by the Cabinet on 26 December. It represents an increase of about 3.8 percent over FY2025 spending and advances Tokyo’s five-year JPY43 trillion (around US$275 billion) defence build-up plan aimed at reaching 2 percent of GDP ahead of the original 2027 target.
A defining feature of the 2026 budget is its emphasis on enhanced deterrence and modernisation.
A defining feature of the 2026 budget is its emphasis on enhanced deterrence and modernisation. Large allocations are being made to acquire and deploy new capabilities such as multilayered coastal defence networks (the “Shield” system - Synchronised, Hybrid, Integrated and Enhanced Littoral Defence) designed to integrate aerial, surface and underwater unmanned platforms, and tests of long-endurance surveillance drones such as the US-made MQ-9B Sea Guardian. The purchase of upgraded Type-12 surface-to-ship missiles with longer strike ranges is one example of the investments being made in missile capabilities, which Japan has long prioritised as a key component of its security posture. This indicates a shift away from historically purely defensive security postures.
These budget choices are being pursued as part of a broader reorientation of Japan’s evolving strategic approach. Tokyo’s current National Security Strategy, approved by the Cabinet in December 2022, already described the region’s security environment as the most severe since World War II, and placed China and North Korea at the centre of Japan’s threat assessments. The strategy has encouraged increased acquisition of cutting-edge assets intended to support deterrence outside of Japan's immediate borders, broader defence capability, and closer integration with the US under the alliance framework.
Prime Minister Sanae Takaichi, who took office in October 2025, signalled her intention to accelerate these efforts by bringing forward the 2 percent of GDP defence spending goal to March 2026 and by initiating a review of Japan’s NSS and related strategic documents to respond to these evolving threats. The review, expected to be completed by the end of 2026, reflects Tokyo’s desire to align its defence policy with regional geopolitical realities, including China's expanding military activities, North Korea’s persistent missile provocations, and broader strategic shifts in the Indo-Pacific.
These budget choices are being pursued as part of a broader reorientation of Japan’s evolving strategic approach.
The upward trajectory of defence spending also dovetails with geopolitical pressures, particularly from Washington, which has been emphasising enhanced burden-sharing among allies. The recently released US National Security Strategy 2025 adopts a more transactional and selective posture in line with the Trump administration’s priorities. In this context, an increased defence budget sends a strong signal of Tokyo's commitment to not only bolster its own deterrence capabilities but also to act as a more proactive partner in regional security. Japan is also wary that Trump could pursue a deal with China that effectively carves up the region, a concern sharpened by the recent deterioration in Beijing–Tokyo ties following Prime Minister Sanae Takaichi’s parliamentary remarks on possible Japanese military involvement in a Taiwan-related crisis.
Neighbours China and South Korea have also been steadily expanding their defence outlays. China continues to field the second-largest defence budget globally, expanding military spending to an estimated 1.78 trillion yuan (around US$246 billion) for 2025, reflecting a 7.2 percent increase. Beijing’s defence outlays, while growing at a single-digit pace, are substantially larger in absolute terms than those of its neighbours and underscore long-term PLA modernisation across domains like naval power, missile forces, and aerospace capabilities. South Korea’s 2026 defence budget is also on an upward trajectory, with the government approving approximately KRW66.3 trillion (about US$47 billion), roughly an 8.2 percent increase over the previous year. Seoul’s allocation, on the other hand, reflects its dual priorities of bolstering conventional defence systems (such as the Korean-style three-axis integrated defence and surveillance networks) and enhancing future-oriented capabilities, including AI and advanced reconnaissance assets.
The upward trajectory of defence spending also dovetails with geopolitical pressures, particularly from Washington, which has been emphasising enhanced burden-sharing among allies.
While all three nations have increased spending, China's budget is much larger than Tokyo and Seoul’s individual allocations, with Japan’s increases marking a shift toward a proactive deterrence posture; China’s spending keeping in tandem with its regional strategic ambitions; and South Korea’s growth reflecting concerns about North Korean threats and a push for self-reliant defence.
For Japan, there are domestic reservations about the budget increase. Increasing defence spending in a nation with the largest public debt in the world and an ageing population inevitably sparks discussion about strategic priorities and economic sustainability. This is especially pertinent with a rise in income tax being in the offing as a necessary measure to secure sustainable funding for higher defence spending. However, the timing of introducing the tax remains contested within the ruling coalition between the Liberal Democratic Party and the Japan Innovation Party. There are also discussions about the future orientation of Japan’s security posture, including questions about constitutional constraints and the potential revision of long-standing principles such as the Three Non-Nuclear Principles.
Increasing defence spending in a nation with the largest public debt in the world and an ageing population inevitably sparks discussion about strategic priorities and economic sustainability.
Tokyo's approach to bolstering deterrence capabilities in an Indo-Pacific security architecture in which Japan plays a more proactive and autonomous role, all while navigating domestic constraints, alliance obligations with the United States, and complex geopolitical dynamics, is demonstrated by its 2026 defence budget, which is not just a numerical high point but rather a clear indication of strategic recalibration.
Pratnashree Basu is an Associate Fellow at the Observer Research Foundation.
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Pratnashree Basu is an Associate Fellow with the Strategic Studies Programme. She covers the Indo-Pacific region, with a focus on Japan’s role in the region. ...
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