  $^{75}$As and $^{139}$La NMR and nuclear quadrupole resonance (NQR) studies
on Zn-substituted LaFeAsO$_{0.85}$ have been performed to investigate the
Zn-impurity effects microscopically. Although superconductivity in
LaFeAsO$_{0.85}$ disappears by 3% Zn substitution, we found that NMR/NQR
spectra and NMR physical quantities in the normal state are hardly changed,
indicating that the crystal structure and electronic states are not modified by
Zn substitution. Our results suggest that the suppression of superconductivity
by Zn substitution is not due to the change of the normal-state properties, but
due to strong non-magnetic pair-breaking effect to superconductivity.
