  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 third-generation flavor violation is
reviewed in the SUSY seesaw model and SUSY SU(5) GUT with the right-handed
neutrinos.
