Tau Lepton-Flavor Violation and the Related Topics in the SUSY Seesaw Models

Neutrino oscillation experiments suggest existence of new flavor-violating interactions in high energy scale. It may be possible to probe them by the flavor- and CP-violating processes in leptons and hadrons in the supersymmetric (SUSY) models. In this article the tau lepton flavor violation and the related topics in the SUSY seesaw model and SUSY SU(5) GUT with the right-handed neutrinos are reviewed.