retroreflective projection technology (RPT). In the TELEsarPHONE system, the face and chest of the slave robot TELESAR II are covered by retroreflective material. To provide the feeling of existence, the real-time image of the visitor is projected onto the robot so that people can see the visitor in real time. In order to demonstrate the feasibility of the concept of mutual telexistence using RPT, the author and his team constructed a hardware system and exhibited it at Expo 2005 Aichi Japan as one of the prototype robots at the Morizo and Kiccoro Exhibition Center from June 9 through June 16, 2005. We assumed that the cockpit booth was located in Tokyo and the robot booth, which was a store specializing in selling stuffed toys, was located in Paris. The store had a telexistence communication robot in order to greet foreign customers without them needing to physically travel to the store. A person in the robot booth, which was supposed to be located on a street in Tokyo as a future extension of a telephone booth, could visit the store in Paris by using the telexistence communication system.