  We investigate kaon photoproduction off the neutron target, i.e., $\gamma n
\to K^0 \Lambda$, focusing on the role of nucleon resonances given in the
Review of Particle Data Group in the range of $\sqrt{s} \approx 1600 - 2200$
MeV. We employ an effective Lagrangian method and a Regge approach. The strong
couplings of nucleon resonances with $K\Lambda$ vertices are constrained by
quark model predictions. The numerical results of the total and differential
cross sections are found to be in qualitative agreement with the recent CLAS
and FOREST experimental data. We discuss the effects of the narrow nucleon
resonance $N(1685,1/2^+)$ on both the total and differential cross sections
near the threshold energy. In addition, we present the results of the beam
asymmetry as a prediction.
