  We study the see-saw enhancement mechanism in presence of the right-handed
phases of the Dirac neutrino mass matrix and the Majorana mass matrix. The
enhancement condition given by Smirnov is modified. We point out that the
see-saw enhancement could be obtained due to the right-handed phases even if
the Majorana matrix is proportional to the unit matrix. We show a realistic
Dirac mass matrix which causes the see-saw enhancement.
