Japan's legions of robots, the world's largest fleet of mechanized workers, are being idled as the country suffers its deepest recession in more than a generation as consumers worldwide cut spending on cars and gadgets. At a large Yaskawa Electric factory on the southern Japanese island of Kyushu, where robots once churned out more robots, a lone robotic worker with steely arms twisted and turned, testing its motors for the day new orders return. Its immobile co-workers stood silent in rows, many with arms frozen in midair. They could be out of work for a long time. Japanese industrial production has plummeted almost 40 percent and with it, the demand for robots.