Japan Mass-Produces 3D-Printed Terra B1 Interceptor Drones

Japan Puts 3D-Printed Interceptor Drones Into Mass Production

Japan's military is moving fast to stockpile counter-drone weapons. The country's Acquisition, Technology and Logistics Agency (ATLA) signed a mass production deal with Terra Drone for the Terra B1, a rocket-launched interceptor built using 3D printers.

The Terra B1 is a development of the A1 model already in use with Ukrainian forces. Japan tested the drone with its Maritime Self-Defense Force in late July and early August. The results were good enough to secure a procurement contract by late August, with deliveries starting around September 2026.

What makes this notable is the manufacturing method. The drones are fabricated with 3D printing, which lets Terra Drone iterate designs quickly and produce units in smaller batches without the tooling costs of conventional aerospace manufacturing. That matters for interceptor drones, which may need rapid updates as threats evolve.

The B1 is designed to counter one-way attack platforms like the Shahed loitering munition and the IAI Harpy. These are the cheap, massed drones that have reshaped air defense thinking since 2022. A 3D-printed interceptor gives Japan a way to build stockpiles without locking itself into a single manufacturer's supply chain.