  We discuss the energy scale profile of the bi-maximal mixing which is given
at the GUT energy scale in the minimal SUSY model, associated with an
assumption that Y_nu^dagger Y_nu is diagonal, where Y_nu is the neutrino-Yukawa
coupling matrix. In this model, the Dirac mass matrix which appears in the
seesaw neutrino mass matrix is determined by three neutrino masses, two
relative Majorana phases and three heavy Majorana masses. All CP phases are
related by two Majorana phases. We show that the requirement that the solar
mixing angle moves from the maximal mixing at GUT to the observed one as the
energy scale decreases by the renormalization effect. We discuss the
leptogenesis, and the lepton flavor violation process by assuming the universal
soft breaking terms.
