A "Giant Torayan" Robot

A "Giant Torayan" robot shoots fire from its mouth during "Roppongi Art Night" in Tokyo on March 27, 2009. Made of aluminum and standing 7.2m tall (23.6 ft), the Giant Torayan robot was created by Japanese artist Kenji Yanobe. (Photo credit should read YOSHIKAZU TSUNO/AFP/Getty Images)

A child robot

A child robot "Child-robot with Biomimetic Body" or CB2 (CB square), equipped with 51 air actuators, 5 motors and 197 tactile sensors under soft silicone skin on its child sized body, measuring 130cm tall and weighing 33kg at his laboratory in Osaka University in Suita city in Osaka prefecture on March 10, 2009. (Photo credit should read YOSHIKAZU TSUNO/AFP/Getty Images)

A robotic hand produced

A robotic hand produced by Japanese robotics company Squse picks up a piece of sushi during a demonstration at the International Food Machinery and Technology Exhibition (FOOMA) in Tokyo on June 10, 2009. (Photo credit should read YOSHIKAZU TSUNO/AFP/Getty Images)

A humanoid robot

A humanoid robot, HRP-4C, developed by Japan's Advanced Industrial Science and Technology (AIST) shows off her skills during the Digital Contents Expo in Tokyo on October 22, 2009. (Photo credit should read YOSHIKAZU TSUNO/AFP/Getty Images)

A dental paitent robot

A dentist operates on a humanoid dental patient robot, named Hanako Showa, during a demonstration of dental treatment at Showa University on March 25, 2010 in Tokyo, Japan. (Photo by Koichi Kamoshida/Getty Images)

A robot balances on one leg

A robot balances on one leg during a show titled "better living with robots"at the Japanese pavilion at the site of the World Expo 2010 in Shanghai on May 18, 2010. (Photo credit should read PHILIPPE LOPEZ/AFP/Getty Images)

A statue of 'Gundam'

A statue of cult cartoon and comic book robot 'Gundam' stands at a park in Shizuoka city, west of Tokyo, on July 6, 2010. (Photo credit should read YOSHIKAZU TSUNO/AFP/Getty Images)

A "slim athlete" robot

The HRP-4, a "slim athlete" robot performs during a joint press conference from Kawada Industries and the National Institute of Advanced Industrial Science and Technology in Tsukuba, Ibaraki prefecture on September 15, 2010. (Photo credit should read TOSHIFUMI KITAMURA/AFP/Getty Images)

A unicycle robot

Japanese electronics parts maker Murata Electronics displays the company's unicycle robot called the "Murata Seiko-chan" during a demonstration at Ceatec, Asia's largest electronics trade show in Chiba, suburban Tokyo on October 5, 2010. (Photo credit should read YOSHIKAZU TSUNO/AFP/Getty Images)

Humanoid robots called "Nao"

Humanoid robots called "Nao" from the French robotics venture Aldebaran demonstrate their skills during a display at the French Embassy in Tokyo on October 13, 2010. (Photo credit should read YOSHIKAZU TSUNO/AFP/Getty Images)

A humanoid robot

A 1.58m tall humanoid robot "HRP-4C" of Japan's Advanced Industrial Science and Technology (AIST) sings and dances with performers at the Digital Contents Expo in Tokyo on October 17, 2010. (Photo credit should read YOSHIKAZU TSUNO/AFP/Getty Images)