  We study phenomenological predictions in the scenario with the
quasi-degenerate relation among neutrino Dirac masses, m_D1 simeq m_D2 < m_D3,
assuming the bi-maximal mixing at the grand unification scale in supersymmetric
standard models with right-handed neutrinos. A sufficient lepton number
asymmetry can be produced for successful leptogenesis. The lepton flavor
violating process mu to e gamma can be enhanced due to the Majorana phase, so
that it can be detectable at forthcoming experiments. The processes tau to e
gamma and tau to mu gamma are suppressed because of the structure of neutrino
Dirac masses, and their branching ratios are smaller than that of mu to e
gamma.
