The World Expo held in Aichi has been over for a few months now, and if you didn’t have the chance to visit it, you could test the “Robot Information”, a robotic receptionist that has the goal to inform you. As you can see on the video and the pictures, it’s quite an impressive machine, and it detects your presence and understands more or less everything you say (I don’t know whether it understood my question, but the Toyota booth was quite a major event of this expo, so the robot must have understood it).