Andoroid Repliee Q2 (L) faces graduate student Motoko Noma at an exhibition during Core Technology Symposium in Tokyo October 31, 2006. Repliee Q2, with 42 actuators to generate humanlike behaviour, has been developed by the Department of Adaptive Machine Systems Graduate School of Engineering of Osaka University. REUTERS/Kiyoshi Ota

ASIMO, a humanoid robot created by Honda, serves tea to a visitor during the Johannesburg International Motor Show at Nasrec in Johannesburg, October 6 2011.REUTERS/Siphiwe Sibeko

An employee of Germany's biggest retailer Metro AG takes a selfie with HI-4, a life-size humanoid robot at Metro's headquarters in Duesseldorf, Germany, June 7, 2016.

Pingpong-playing robot "Topio" is displayed during the InternationalRobot Exhibition 2009 in Tokyo November 25, 2009. The bipedal humanoidrobot is designed to play table tennis against a human being.REUTERS/Kim Kyung-Hoon

ChihiraAico, a communication android robot, talks to show goers at the Toshiba booth at the International Consumer Electronics show (CES) in Las Vegas, Nevada January 6, 2015. The robot is controlled by pneumatics.

A robot of the Siasun Robot and Automation Corporation simulates the use of a medical instrument on a model of a human skeleton at the WRC 2016 World Robot Conference in Beijing, China, October 21, 2016.

A baby chick (R) looks at Japanese toy maker Sega Toy's robot chick "Yume Hiyoko" (Dream Chick) at a chicken farm in Ome, outskirts of Tokyo April 6, 2007. The electronic robot chick which cheeps and move its wings at the touch of human hands is not only a toy for children but also a healing gadget for adults, the company said. REUTERS/Yuriko Nakao

Honda Motor Co's Asimo humanoid robot opens the top of a bottle to pour the drink into a cup during a news conference at the 42nd Tokyo Motor Show in Tokyo November 30, 2011. REUTERS/Toru Hanai

The hitchBOT is seen posed next to Highway 17 north of Sault Ste. Marie, Ontario, and a portion of the Trans-Canada Highway August 5, 2014. The hitch-hiking robot is now at the halfway point in its journey across Canada. Picture taken August 5, 2014. REUTERS/Kenneth Armstrong

Belgian Ian Frejean, 11, walks with "Zora" the robot, a humanoid robot designed to entertain patients and to support care providers, at AZ Damiaan hospital in Ostend, Belgium June 16, 2016.

A staff member listens to Toyota Motor Corp's Kirobo Mini robot's voice as she poses with the robot after a news conference in Tokyo, Japan, September 27, 2016.

Titan, the robot created by Cyberstein Robots Ltd., performs during a promotional event at the Qwartz shopping centre in Villeneuve-la-Garenne, near Paris, France, October 30, 2015.

A pair of next generation dexterous humanoid robots named Robonaut2 are seen in this NASA handout picture taken July 28, 2009, and released to Reuters April 14, 2010. The robots were designed to use the same tools as humans, which allows them to work safely alongside humans on Earth and in space. Picture taken July 28, 2009. REUTERS/NASA/Handout

A humanoid robot named "I-Fairy" (C) acts as a witness at the wedding ceremony between Tomohiro Shibata (L) and Satoko Inoue in Tokyo May 16, 2010. The couple decided to use the robot, which conducted the ceremony with its audio functions, from Inoue's company to perform the witness' duties as they first met due to common work interest related to robots. REUTERS/Yuriko Nakao

Panasonic's "Evolta" swim robot, powered by the company's Evolta rechargeable batteries, is demonstrated at a pool during a news conference in Tokyo September 15, 2011.

SoftBank Corp. Chief Executive Masayoshi Son (R) presents the company's human-like robots named 'pepper' during a news conference in Urayasu, east of Tokyo June 5, 2014. Japan's SoftBank Corp unveiled the human-like robots which it will use to staff its cellphone stores and personal usage at a home, in a move aimed at expanding the mobile phone and Internet conglomerate's technological reach. Son announced the plan at a news conference on Thursday, the robot will go on sale to public in Japan from February 2015, which price is about 198,000 yen. Softbank will use technologies developed by French robotics company Aldebaran, in which it took a stake in 2012. REUTERS/Issei Kato

A robot in the Robotic Kitchen prototype created by Moley Robotics cooks a crab soup at the company's booth at the world's largest industrial technology fair, the Hannover Messe, in Hanover April 13, 2015. REUTERS/Wolfgang Rattay TPX IMAGES OF THE DAY - RTR4X4SW

Japan's Murata Manufacturing Co. Ltd's latest concept robots, the "Murata Cheerleaders", demonstrate how they balance on balls and synchronise as a team by utilising sensing and communication technology, at the Combined Exhibition of Advanced Technologies (CEATEC) JAPAN 2014 in Chiba, east of Tokyo, October 7, 2014. Over 500 companies and organisations are exhibiting at CEATEC JAPAN 2014, which will be held until October 11, 2014. REUTERS/Issei Kato

A visitor kneels down nex to an iCub robot made by the Italian Institute of Technology at the scientists congress IROS 2015 in Hamburg, Germany October 2, 2015.The robot congress is organized by TAMS group (Technical Aspects of Multimodal Systems) of Hamburg's university. REUTERS/Fabian Bimmer - RTS2QUB