General Nakatani’s assessment, delivered to the Diet’s security committee on Tuesday, represents a significant strategic pivot for Tokyo. The Defence Minister explicitly stated that Japan’s capacity to deter aggression, particularly from China and North Korea, is now directly dependent on the speed of its military expansion. This is not a routine readiness review.
It is a threat vector analysis from a nation that has historically relied on the US security umbrella and constrained defence spending. Japan’s 2023 National Security Strategy abandoned a half-century of purely defensive posture, but Nakatani’s warning signals that bureaucratic inertia is a liability. The current procurement cycles for Aegis Ashore replacements, long-range cruise missiles (12 Type), and upgraded F-15J fighters are measured in years, not months.
Meanwhile, PLA naval exercises in the East China Sea have doubled in frequency since 2021. The intelligence failure here would be assuming we have time. Logistics is the cornerstone: Japan’s munitions stockpiles are critically low for sustained operations, a fact highlighted by the Ministry of Defense’s own internal audits.
The decision to base co-development of a next-generation fighter with the UK and Italy is positive, but fielding it by 2035 ignores the immediate window. Cyber warfare capabilities are equally urgent. The recent attack on Mitsubishi Electric, suspected to be state-sponsored, exposed vulnerabilities in critical defence supply chains.
Nakatani’s call for a ‘rapid build-up’ is a direct response to these intelligence gaps. The strategic takeaway: the window for reinforcing Japan’s defensive architecture is closing. Every procurement delay, every budget dispute, every legislative hurdle is a tactical advantage for Beijing.
The US-Japan alliance remains credible only if Tokyo demonstrates it can accelerate its own transformation. Defence analysts should watch the FY2025 budget proposal: a significant increase beyond the 2% of GDP target would validate the urgency. Otherwise, this warning risks being filed under ‘missed warnings’ in future post-mortems.
