  We analyze in detail lepton-flavor violation (LFV) in the charged-lepton
sector such as $\mu \to e \gamma$, $\tau \to \mu \gamma$, $\mu \to eee$ and the
$\mu \to e$ conversion in nuclei, within the framework of supersymmetric models
with lopsided Froggatt--Nielsen charges, in which the large mixing in the
neutrino sector as well as small mixings in the quark sector can be naturally
accommodated. We show that the present experimental limits on the LFV processes
already exclude some of the models. The future proposed search for LFV,
especially in muon processes, can provide a significant probe to this
framework. We also stress the importance of the measurement of $U^{MNS}_{e3}$
in neutrino experiments, and the fact that the KamLAND experiment could play a
significant role to test a certain class of models.
