  We study the sensitivity of atmospheric neutrino experiments to the neutrino
non-standard interactions (NSI) which is motivated by the tension between the
two mass squared differences extracted from the KamLAND and solar neutrino
experiments. In this study the sensitivity of the future Hyper-Kamiokande
experiments for 4438 days to NSI is shown. Assuming that the mass hierarchy is
known, we find that the best-fit value from the solar neutrino and KamLAND data
can be tested at more than 8 $\sigma$, while the one from the global analysis
can be examined at 5.0 $\sigma$ (1.4 $\sigma$) for the normal (inverted) mass
hierarchy.
