An Osaka-based technology firm is organizing the world's first marathon for robots.

So far, five robots have been entered in the event, which is expected to last for four days next week. Organizer Vstone Co. said Wednesday the race will demonstrate the machines' durability and maneuverability.

The Robo Mara Full marathon kicks off next Thursday and is open only to androids with two legs. The robots must complete 422 laps around a 100-meter indoor track in Osaka to finish the 42-km race.

The survivors — which will be allowed to stop for battery changes and repairs — are expected to hit the finish line on Feb. 27, when their human counterparts embark on the popular Tokyo Marathon.