  Extending the hadronic Lagrangians that we recently introduced for studying
pentaquark $\Theta^+$ baryon production from meson-proton, proton-proton, and
photon-proton reactions near threshold to include the anomalous interaction
between $\gamma$ and $K^*K$, we evaluate the cross section for $\Theta^+$
production from photon-neutron reactions, in which the $\Theta^+$ was first
detected in the SPring-8 experiment in Japan and the CLAS experiment at Thomas
Jefferson National Laboratory. With empirical coupling constants and form
factors, and assuming that the decay width of $\Theta^+$ is 20 MeV, the
predicted cross section is found to have a peak value of about 280 nb, which is
substantially larger than that for $\Theta^+$ production from photon-proton
reactions.
