Osaka is the core city of the second largest Keihanshin metropolitan area following Tokyo metropolitan area, with approximately 220 km² in size and a population of 2.6 million at night and 3.6 million during the day. It is highly concentrated with urban functions in a small urban area compared to other large cities worldwide. Thus, the City has great responsibility, having diverse people, firms, technologies, and information. To support them, it is critical to establish a transport system for smoothing complex movement of people and goods.