TOKYO, JAPAN — In the lobby of the Marunouchi Nijubashi Building, which is undergoing final preparations to host the 2020 Olympics, a robot is on patrol. A combination of information kiosk and surveillance camera, the robot stops directly in front of me. It has the word ALSOK plastered across its neck, or at least what I consider to be its neck. Its face is a screen filled with Japanese text; it looks like I can touch it if I want to, but I am not confident enough to reach out and try. I step out of its way and it rolls by me, back toward a case full of old Olympic torches it is charged with protecting.