Researchers in Japan have jointly developed a robot with four arms and four crawlers which can perform multiple tasks simultaneously to help clean up the rubble left after the 2011 quake-tsunami disasters in Minamisoma, Fukushima.

On March 13th, a remote controlled four-armed, four-wheeled crawler robot designed to clear rubble and save lives in areas with complex terrain was unveiled at the Kikuchi plant in Minami-Soma Fukushima, previously a designated no-go zone from the nuclear disaster crisis. The robot is a collaborative effort between Waseda University's Future Robotics Organization and the Kikuchi Corporation.

The robot's name, "Octopus," derives from the fact that it has eight limbs and is 1.7 meters in height and weights 70 kilograms. The robot can be equipped with a fiber laser capable of cutting through stone and a grappler capable of dealing with radioactive waste. It is expected to have a wide range of applications including assistance in lifesaving efforts for people trapped in buildings destroyed by earthquakes, tsunamis, and fires and radioactive waste management.

Robots of this variety have generally been focused on performing one function at a time on flat terrain. However, the Octopus robot's ability to utilize its four wheels and crawlers to traverse complex terrain and rubble and its ability to utilize all four of its arms simultaneously thanks to its hydraulic capabilities allows it to perform a wide range of tasks such as clearing rubble, fallen trees, and extinguishing fires. When traversing uneven terrain, the robot uses its two rear arms to support its body while climbing with its two front arms and crawlers. Each arm is capable of lifting objects of up to 200 kilograms and all four arms can be used to lift the robot's body from the ground. This type of robot that can utilize four arms simultaneously is very rare. Presently the robot is operated by two people from a remote location but is expected to be operated by one in the future.

The Octopus robot was revealed at a conference for the Fukushima Disaster and Medical Welfare Project. Professor Masakatsu Fujie's robot was presented alongside other robots designed to deal with the issues presented by the Fukushima nuclear disaster and assist in reconstruction efforts.