  The LiteBIRD satellite is planned to be launched by JAXA in the late 2020s.
Its main purpose is to observe the large-scale B-mode polarization in the
Cosmic Microwave Background (CMB) anticipated from the Inflation theory.
LiteBIRD will observe the sky for three years at the second Lagrangian point
(L2) of the Sun-Earth system. Planck was the predecessor for observing the CMB
at L2, and the onboard High Frequency Instrument (HFI) suffered contamination
by glitches caused by the cosmic-ray (CR) hits. We consider the CR hits can
also be a serious source of the systematic uncertainty for LiteBIRD. Thus, we
have started a comprehensive end-to-end simulation study to assess impact of
the CR hits for the LiteBIRD detectors. Here, we describe procedures to make
maps and power spectra from the simulated time-ordered data, and present
initial results. Our initial estimate is that $C_l^{BB}$ by CR is $\sim 2
\times 10^{-6}~\mu$K$_{\mathrm{CMB}}^{2}$ in a one-year observation with 12
detectors assuming that the noise is 1~aW/$\sqrt{\mathrm{Hz}}$ for the
differential mode of two detectors constituting a polarization pair.
