Japan experiments with autonomous AI chainsaw-wielding robots

What happened

A scary-looking humanoid (a robot built in roughly human shape) robot with a chainsaw arm was shown in action on Japanese TV news trimming tree branches that had begun encroaching on railway lines. The rail truck-mounted mech was being used by Japanese railway firm JR East to clear tree branches that had begun to impede rail tracks.

A scary-looking humanoid robot with a chainsaw arm was shown in action on Japan's ANN News recently. The unnamed heavy machinery robot’s chainsaw and grabber arms are remotely controlled by a human in this instance.

However, JR East is broadly integrating AI and robotic technologies across its operations to enhance safety, efficiency, and round-the-clock maintenance. In the future, this robot could become autonomous with AI-based image analysis for recognizing rail obstructions that need to be addressed.

Japan experiments with autonomous AI chainsaw-wielding robots — video shows rail truck-mounted metal humanoid cutting down tree branches News By Mark Tyson Published 28 October 2026 The frightening-looking mech in the demo still has a human operator, for now. JR East is the largest passenger railway operator in Japan.

It is famous for operating the northern Shinkansen (bullet train) routes, but also has business interests/revenue from shopping centers, hotels, smart cards, and more. The firm has a reputation for quite aggressive AI adoption, including company-wide AI tools, designing AI programs for disaster recovery, and it is even using drones equipped with AI image analysis for rail infrastructure inspections (PDF).

Latest Videos From Tom's Hardware Watch full video here: The source video and report (machine translation) indicate that the chainsaw mech you see has been available to JR East engineers since March, but the TV crew took the opportunity to catch a rare glimpse of this heavy machinery in action. JR East is turning to robots like this due to labor shortages .