  We performed a search for event bursts in the XMASS-I detector associated
with 11 gravitational-wave events detected during LIGO/Virgo's O1 and O2
periods. Simple and loose cuts were applied to the data collected in the full
832 kg xenon volume around the detection time of each gravitational-wave event.
The data were divided into four energy regions ranging from keV to MeV. Without
assuming any particular burst models, we looked for event bursts in sliding
windows with various time width from 0.02 to 10 s. The search was conducted in
a time window between $-$400 and $+$10,000 s from each gravitational-wave
event. For the binary neutron star merger GW170817, no significant event burst
was observed in the XMASS-I detector and we set 90% confidence level upper
limits on neutrino fluence for the sum of all the neutrino flavors via coherent
elastic neutrino-nucleus scattering. The obtained upper limit was
(1.3-2.1)$\times 10^{11}$ cm$^{-2}$ under the assumption of a Fermi-Dirac
spectrum with average neutrino energy of 20 MeV. The neutrino fluence limits
for mono-energetic neutrinos in the energy range between 14 and 100 MeV were
also calculated. Among the other 10 gravitational wave events detected as the
binary black hole mergers, a burst candidate with a 3.0$\sigma$ significance
was found at 1801.95-1803.95 s in the analysis for GW151012. However, no
significant deviation from the background in the reconstructed energy and
position distributions was found. Considering the additional look-elsewhere
effect of analyzing the 11 GW events, the significance of finding such a burst
candidate associated with any of them is 2.1$\sigma$.
