Japan is moving to institutionalize unmanned warfare capabilities within its Ground Self-Defense Force (GSDF), signaling a broader transformation in how it prepares for future conflict. The move underscores Tokyo’s urgency to adapt to drone-centric warfare amid intensifying regional tensions and a shrinking workforce.
On April 13, the Ministry of Defense held a ceremony in Tokyo to mark the establishment of two specialized offices tasked with advancing the use of unmanned systems. The GSDF said it established the “Unmanned Defense Capability Promotion Office” and the “Unmanned Systems Office” on April 8 within its Ground Staff Office in Ichigaya.
Although small in size – just 13 personnel in total – the two offices carry an outsized mandate. The promotion office, staffed by seven members, is responsible for developing operational concepts, conducting research and development, and training personnel. The systems office, with six members, oversees procurement, logistics, and maintenance of unmanned platforms.
In remarks at the ceremony, Defense Minister Koizumi Shinjiro framed the initiative as both a strategic and operational imperative. “Taking into account the geographical characteristics of our nation as a maritime nation, we must realize new ways of fighting at the earliest possible time,” he said. He also stressed the need to transform the Self-Defense Forces into “the organization that makes the greatest use of unmanned assets in the world,” while prioritizing the protection of personnel.
The push reflects lessons drawn from recent conflicts. The widespread use of drones in Russia’s invasion of Ukraine – as well as in the conflict involving the United States, Israel, and Iran – has highlighted the growing importance of unmanned systems in modern warfare. Relatively low-cost and deployable in large numbers, such systems have proven effective in reconnaissance, strike missions, and attritional operations, challenging traditional force structures.
Japan has already embedded this recognition in its strategic documents. The National Defense Strategy approved in December 2022 identifies unmanned systems – particularly when integrated with artificial intelligence (AI) and manned platforms – as potential “game changers” capable of fundamentally reshaping force composition and operational concepts. The new GSDF offices are intended to translate that vision into practical capability.
Their scope extends well beyond aerial drones. As of the end of March last year, the GSDF possessed about 1,200 unmanned systems, including those used for reconnaissance, underscoring Tokyo’s shift from a reconnaissance-heavy inventory toward a more diversified and strike-capable unmanned force. Officials say the promotion office will examine the integration of unmanned ground vehicles (UGVs), unmanned surface vessels (USVs), and unmanned underwater vehicles (UUVs), including systems with strike capabilities. This multi-domain approach aligns with Japan’s focus on defending its long coastline and remote southwestern islands, where persistent surveillance and rapid response are essential.
The Ministry of Defense is backing the effort with significant investment. Under its five-year defense buildup plan through fiscal 2027, Tokyo plans to allocate about 1 trillion yen ($6.3 billion) to procure several thousand unmanned systems across the Ground, Maritime, and Air Self-Defense Forces. Initiatives such as the “SHIELD” concept envision the mass deployment of unmanned assets to reinforce coastal defense and complicate adversary operations.
The GSDF has already begun shifting toward more offensive applications. In February, it selected loitering munitions designed to strike infantry units at close range. It also plans to introduce unmanned systems capable of conducting medium- to long-range attacks against lightly armored vehicles and surface vessels. Such moves mark a gradual but notable evolution in Japan’s traditionally defense-oriented posture.
At the same time, the push toward unmanned systems is being driven as much by necessity as by strategy. The Self-Defense Forces are facing a persistent recruitment shortfall. As of March 2025, overall staffing stood at 89.1 percent of authorized strength – the first time in 25 years it has fallen below 90 percent. The GSDF is particularly affected, with a fill rate of 87.7 percent.
Demographic trends suggest the challenge will intensify. Japan’s recruiting-age population is projected to decline by roughly 30 percent by fiscal year 2045. In this context, unmanned systems offer a means to sustain operational capability while reducing dependence on manpower. They can operate in hazardous environments, conduct long-duration missions, and limit risks to personnel.
The establishment of the new offices also underscores the early stage of Japan’s institutional adaptation. With only 13 personnel, they represent a starting point rather than a fully developed capability. Their effectiveness will depend on how quickly Japan can scale up procurement, integrate unmanned systems into joint operations, and develop the doctrine and training required to employ them effectively.
Further changes are likely. The government is expected to revise its three key security documents later this year, with greater emphasis anticipated on “new ways of fighting” that combine AI, unmanned platforms, and conventional forces.
For now, the message from Ichigaya is clear. Japan is no longer content to observe the rapid evolution of drone warfare. It is seeking to internalize it – and, if possible, shape it to fit its own strategic and geographic realities.
Source:
thediplomat.com
