FieldAI Robots Deployed at Over 10 Construction Sites in Japan

TOKYO -- Japanese construction firm Kajima has introduced robots utilizing FieldAI's autonomy technology developed in the United States at more than 10 construction sites in Japan, progressing past tests and entering regular use.

Kajima announced Nov. 5 that robots from unnamed manufacturers equipped with FieldAI's technology have completed more than 2,000 autonomous patrols across different construction sites and applications. The number of deployed robots has not been revealed.

Robots patrol sites, snapping photos and measuring 3D data to assess construction progress. Robots are also employed for security patrols during nighttime and off working hours by warning about any irregularities detected.

Technology from FieldAI makes robots capable of patrolling sites where the environment changes while the construction continues, without the need for fixed routes or satellite positioning systems.

The combination of cameras, lidar sensors and computers aboard robots with FieldAI's Field Foundation Models (FFMs) processes information of surroundings and determines the path of movement for robots.

Kajima reported the robots can navigate through unknown regions, generate 3D maps, steer clear of obstacles, and update the map on subsequent missions. They can also work in indoor and underground environments where satellite navigation and external communication might not be possible.

After finishing their inspection process, the robots return to the charging stations to upload the information collected for analysis by construction workers.

Kajima and FieldAI began collaborating in 2023, testing and improving the autonomy technology at construction sites before expanding its use through a broader agreement signed in 2025.