Japan Orders Mass Production of 3D-Printed Terra B1 Interceptor Drones

Japan's Acquisition, Technology and Logistics Agency has approved Terra Drone's Terra B1 interceptor for mass production. The decision moves the rocket-powered counter-drone system from prototype to factory line. Deliveries to the Maritime Self-Defense Force start this month.

The Terra B1 is built around 3D-printed airframe components. That matters for a simple reason: interceptors get used once. Being able to print replacement drones quickly cuts the logistics chain and lowers unit cost compared to traditionally manufactured equivalents. The B1 traces its lineage to the A1, a system already in combat with Ukrainian forces since early 2026.

Thirty-eight companies submitted proposals for ATLA's Interceptor Drone Early Acquisition Program. Terra Drone won because it met every metric ATLA laid out: effective range, flight duration, guidance method, simultaneous control capacity, and operational track record. The B1 is designed to stop Shahed-style loitering munitions and anti-radar drones like the IAI Harpy.

The parallels with US practice are hard to miss. During RIMPAC 2026, sailors aboard the USS Essex used a containerized 3D printing factory to build twelve flight-ready FPV drones and more than a thousand replacement parts while at sea. Those were cheap, disposable platforms. The Terra B1 sits a step above that in capability but shares the same philosophy: speed of production matters more than perfect reusability.

Japan's Air Self-Defense Force and Ground Self-Defense Force may follow the navy's lead. If they do, the domestic production line Terra Drone is setting up will have to scale fast. The company is also building its own flight controller, the Terra DFC, in-house to keep supply chains under control.