  JSNS$^2$ searches for short baseline neutrino oscillations with a baseline of
24~meters and a target of 17~tonnes of the Gd-loaded liquid scintillator. The
correct algorithm on the event reconstruction of events, which determines the
position and energy of neutrino interactions in the detector, are essential for
the physics analysis of the data from the experiment. Therefore, the
performance of the event reconstruction is carefully checked with calibrations
using $^{252}$Cf source. This manuscript describes the methodology and the
performance of the event reconstruction.
