Publisher Summary The applied technology of superconductivity is such an important technology as it brings about revolution in the industrial structure of the world in the next century. As well known, current superconducting applied technologies have recently made rapid progress, especially in terms of electronic equipment and communication system. However, in the area of energy for which the application of superconducting technology can have a great impact on society, there is yet be a need for many more difficult technology developments. The superconducting Maglev system has been under development for the past 25 years in Japan. The vehicle can be magnetically levitated as much as 100 mm from the guideway surface using the superconducting magnets on board. In 1990, the maglev system gained status as one of the nationally-funded projects in Japan. The government authorized the 42.8-km test line in Yamanashi Prefecture and R&D entered a new phase. This new test line is planned to go through an area near Tokyo ‘on the proposed Chuo line, which is expected to be a new important line connecting Tokyo and Osaka, the central part of Japan.