  The $\alpha$ inelastic scattering on $^{16}$O is investigated with the
coupled-channel calculation using the $\alpha$-nucleus coupled-channel
potentials, which are microscopically derived by folding the the Melbourne
$g$-matrix $NN$ interaction with the $^{16}$O and $\alpha$ densities. The
matter and transition densities of $^{16}$O are calculated by a microscopic
structure model of the variation after the spin-parity projections combined
with the generator coordinate method of $^{12}$C+$\alpha$ in the framework of
the antisymmetrized molecular dynamics. The calculation reproduces the observed
elastic and inelastic cross sections at incident energies of $E_\alpha$=104
MeV, 130 MeV, 146 MeV, and 386 MeV. The coupled-channel effect on the cross
sections is also discussed.
