Dinosaur robots acting as receptionist greet a hotel employee demonstrating how to check-in to the hotel during a press preview for the newly-opening Henn na Hotel Maihama Tokyo Bay in Urayasu, east of Tokyo, Japan March 15, 2017. Japan's second robot-run hotel Henn na Hotel ('strange hotel' in Japanese) opened on March 15, 2017 as the robot-staffed hotel near Tokyo, operating company H.I.S. Co. said. REUTERS/Issei Kato TPX IMAGES OF THE DAY - RTX3126A

Tapia, a concierge robot through which the hotel guests can control equipments in the room such as television, air conditioner or illumination by voice communication or touching the robot, is seen during a press preview for the newly-opening Henn na Hotel Maihama Tokyo Bay in Urayasu, east of Tokyo, Japan March 15, 2017. Japan's second robot-run hotel Henn na Hotel ('strange hotel' in Japanese) opened on March 15, 2017 as the robot-staffed hotel near Tokyo, operating company H.I.S. Co. said. REUTERS/Issei Kato - RTX3123F

Dinosaur robots acting as receptionist greet a hotel employee demonstrating how to check-in to the hotel during a press preview for the newly-opening Henn na Hotel Maihama Tokyo Bay in Urayasu, east of Tokyo, Japan March 15, 2017. Japan's second robot-run hotel Henn na Hotel ( 'strange hotel' in Japanese) opened on March 15, 2017 as the robot-staffed hotel near Tokyo, operating company H.I.S. Co. said. REUTERS/Issei Kato - RTX311ZC

Image used for illustrative purpose. Tapia, a concierge robot through which the hotel guests can control equipments in the room such as television, air conditioner or illumination by voice communication or touching the robot, is seen during a press preview for the newly-opening Henn na Hotel Maihama Tokyo Bay in Urayasu, east of Tokyo, Japan March 15, 2017.

Robot fish swim in the water tank at the entrance hall of the newly-opening Henn na Hotel Maihama Tokyo Bay during a press preview in Urayasu, east of Tokyo, Japan March 15, 2017. Japan's second robot-run hotel Henn na Hotel ('strange hotel' in Japanese) opened on March 15, 2017 as the robot-staffed hotel near Tokyo, operating company H.I.S. Co. said. REUTERS/Issei Kato - RTX3124F

A dinosaur robot acting as a receptionist demonstrates how to check-in to the hotel during a press preview for the newly-opening Henn na Hotel Maihama Tokyo Bay in Urayasu, east of Tokyo, Japan March 15, 2017. Japan's second robot-run hotel Henn na Hotel ('strange hotel' in Japanese) opened on March 15, 2017 as the robot-staffed hotel near Tokyo, operating company H.I.S. Co. said. REUTERS/Issei Kato - RTX3121X

A life-size Dinosaur model is displayed next to a robot (L) at the entrance hall of the newly-opening Henn na Hotel Maihama Tokyo Bay, during a press preview in Urayasu, east of Tokyo, Japan March 15, 2017. Japan's second robot-run hotel Henn na Hotel ('strange hotel' in Japanese) opened on March 15, 2017 as the robot-staffed hotel near Tokyo, operating company H.I.S. Co. said. REUTERS/Issei Kato - RTX31259

A dinosaur robot acting as a receptionist demonstrates how to check-in to the hotel during a press preview for the newly-opening Henn na Hotel Maihama Tokyo Bay in Urayasu, east of Tokyo, Japan March 15, 2017. Japan's second robot-run hotel Henn na Hotel ('strange hotel' in Japanese) opened on March 15, 2017 as the robot-staffed hotel near Tokyo, operating company H.I.S. Co. said. REUTERS/Issei Kato - RTX3121W