Japan's Record Defence Budget: What Is Driving the Shift Away from Pacifism?

Japan announced a record defence budget of $58 billion for the current fiscal year, the twelfth consecutive annual increase in its defence spending. The country is currently executing a five-year plan to double its annual arms outlay to 2 per cent of GDP, crossing an unofficial cap of 1 per cent that had held for decades. If the trajectory continues, Japan is projected to become the world's third-largest defence spender by 2027, behind only the United States and China.

This spending push marks a visible break from the Yoshida Doctrine — the post-World War II framework under which Japan kept its military minimal and delegated national security to the United States. Japan's pacifist identity is anchored in Article 9 of its Constitution, which permanently renounces war as a sovereign right and prohibits maintaining military forces. While Japan does maintain Self-Defense Forces (SDF) drawing on the UN Charter's right to self-defence, the SDF's legal mandate was historically restricted to defensive action against direct attacks on the Japanese mainland. In recent years, the scope was expanded to allow SDF deployment if allied US forces were attacked — on the reasoning that any weakening of America's regional presence directly threatens Japan's security.

Several converging pressures are accelerating this shift. China's rapid maritime build-up and its increasingly assertive posture around Taiwan are seen as direct threats to Japan's vital sea lanes. North Korea's repeated intercontinental ballistic missile tests near Japanese waters add another layer of concern. Domestically, 81.5 per cent of respondents in Japan's FY2024 Domestic Public Opinion Survey agreed that the security environment around East Asia is becoming more severe. In April this year, Japan also overturned its long-standing ban on export of lethal weaponry, signing a $7-billion deal to supply 11 Mogami-class frigates to Australia. Japan has defence memoranda of understanding with 17 countries, including India. The country is also fortifying its southern Ryukyu island chain — islands such as Yonaguni, situated 110 km from Taiwan, are to receive surface-to-air missile systems by 2030.

For India and the broader Indo-Pacific calculus, Japan's defence transformation carries significant weight. Japan is a core member of the Quadrilateral Security Dialogue (QUAD) alongside India, the United States, and Australia — a grouping whose explicit focus is a free, open, and stable Indo-Pacific. A militarily capable and strategically active Japan strengthens the QUAD's collective deterrence posture and increases interoperability options for India. The India-Japan defence relationship is deepening: in addition to the MoU on defence equipment, both countries have signed the Acquisition and Cross-Servicing Agreement (ACSA), enabling logistical support between their forces. Japan's willingness to export platforms like frigates also opens doors for future India-Japan defence industrial cooperation.

For exam preparation, key takeaways are: Article 9 of Japan's Constitution renounces war — its revision is actively debated. Japan's five-year defence plan targets 2 per cent of GDP in annual spending. The Yoshida Doctrine (post-1951) is the historic framework being walked back. The Shangri-La Dialogue (Singapore) is an annual security summit where these positions are often formally articulated. QUAD membership — India, US, Japan, Australia — is central to Indo-Pacific security architecture. The Japan-Australia frigate deal (April, $7 billion, 11 Mogami-class ships) is a landmark example of Japan's new export posture. Strategically, Japan's shift is relevant to questions on Indo-Pacific security, great power competition, QUAD, collective self-defence, and India's bilateral defence ties.