  We present successful lepton mass matrices with an inverted mass hierarchy
for neutrinos, which follow from a geometrical structure of a (1+5) dimensional
space-time where two extra dimensions are compactified on the T^2/Z_3 orbifold.
A 5^* and a right-handed neutrino N in each family are localized on each of the
equivalent three fixed points of the orbifold while three 10's and Higgs
doublets H_u and H_d live in the bulk. An S_3 family symmetry is assumed on
three 5^*'s and on three N's, since the three fixed points are equivalent to
one another. The Higgs field \phi responsible for the B-L breaking is localized
on one of the three fixed points, which generates the inverted hierarchy for
the neutrino masses. The baryon asymmetry is well explained in the non-thermal
leptogenesis via inflaton decay. We emphasize that the present model predicts
the effective neutrino mass, <m>_{ee}, responsible for neutrinoless double beta
decays as <m>_{ee}\simeq 50 meV. This will be accessible to future experiments.
