We present the generalities of the JLC project, an e^+e^- linear collider planned as a future project of KEK, aiming the energies 0.5-1.5 TeV. We discuss first why the 'TeV region' is regarded as essential energy range in the particle physics, and how promising the study in that range will be. Then a general view on the JLC project is presented. The individual physics targets are discussed in more detail.
