  We discuss nuclear effects on neutrino-nuclear interactions in a wide
kinematical range from shallow to deep inelastic scattering (DIS) region. There
is necessity from neutrino communities to have precise neutrino-nucleus cross
sections for future measurements on neutrino oscillations and leptonic CP
violation. We try to create a model to calculate neutrino cross sections in the
wide kinematical range, from quasi-elastic scattering and resonance productions
to the DIS. In this article, nuclear modifications of structure functions are
mainly discussed, and a possible extension to the $Q^2 \to 0$ region is
explained. We also comment on the transition region between baryon resonances
and the DIS. There are ongoing experimental efforts on nuclear modifications of
structure functions or parton distribution functions such as by pA reactions at
RHIC and LHC, Drell-Yan measurements at Fermilab, Miner$\nu$a neutrino DIS, and
charged-lepton DIS at JLab.
