  We present a theoretical study on formation rates of \eta and \omega
meson-nucleus systems induced by (\gamma,p) reactions on nuclear targets at
ideal recoilless condition. We find that the smaller distortion effect in the
(\gamma,p) reaction enables us to investigate properties of the mesons created
deeply inside nucleus more clearly. We also consider excitation of
scalar-isoscalar (\sigma) mode in nucleus in order to investigate spectral
enhancement around two-pion threshold caused by partial restoration of chiral
symmetry. We conclude that valuable information of meson-nucleus interactions
can be extracted from global structure of the missing mass spectra in the
(\gamma,p) reaction.
