Technicians make adjustments to robot rock band Z-Machines' drummer Ashura after the band's debut live concert in Tokyo June 24, 2013. Three robot rockers took to the stage in Tokyo on Monday to perform three songs, including one in collaboration with Japanese pop girl duo Amoyamo, to a crowd of nearly 100 people. REUTERS/Toru Hanai (JAPAN - Tags: ENTERTAINMENT SCIENCE TECHNOLOGY SOCIETY)