Japan's Defense Ministry is advancing plans to study the use of AI-powered humanoid robots in noncombat defense tasks, including base patrolling and material transport, government sources told Kyodo News on Tuesday.

The initiative, led by the Acquisition, Technology and Logistics Agency, aims to address manpower shortages in the Self-Defense Forces through physical AI technology that enables robots to analyze sensor data and move autonomously. Officials view the approach as a way to maintain operational capacity without expanding personnel.

Direct combat applications remain off the table. Sources cited risks of misidentification between allies and enemies as well as the absence of international rules governing armed autonomous systems. A senior Liberal Democratic Party security panel executive stated that humanoid robots equipped with weapons are not expected to engage in fighting.

The ministry has included the research as an "item request" in its fiscal 2027 budget proposal without specifying funding amounts. Plans also call for a "Robotics Task Challenge" competition to evaluate robots developed by private companies and universities.

Longer-term applications under consideration include reconnaissance and rescue operations. Demographic projections show the pool of potential recruits aged 18 to 32 will shrink by about 30 percent within two decades, underscoring the need for technological solutions to sustain force levels.

This effort aligns with broader Japanese defense modernization. The government intends to revise its three core security documents by year's end to emphasize AI integration, while the Defense Ministry has separately requested funding for AI-supported command systems and unmanned assets. Prime Minister Sanae Takaichi has directed accelerated adoption of such technologies to adapt to evolving warfare methods.

The focus on private-sector innovation and rear-area support tasks reflects a pragmatic strategy to bolster readiness through efficiency rather than larger standing forces.