This is a video of 'Murata Boy'. I'm not 100% sure of the usage of Murata Boy, I think it is a toy. Although it could be a concept robot, too. The website is not overly informative about the robot itself, but they do have some interesting information about the technologies involved. Primarily the robot achieves bicycle riding abilities through gyroscopes and sensors. There is also a paper craft version of Murata Boy available.