  A high concentration of ultra-high-energy cosmic ray (UHECR) events, called a
hotspot, was reported by the Telescope Array (TA) experiment, but its origin
still remains unsolved. One of the obstacles is that there is no astronomical
object, which could be the source, behind the TA hotpot. In an effort to
understand the origin of the TA hotspot, we suggested a model based on the
magnetized cosmic web structure. The UHECRs were produced from sources in the
Virgo cluster and were initially confined by cluster magnetic fields for a
certain period. Next, some of them preferentially escaped to and propagated
along filaments. Eventually, they were scattered by filament magnetic fields,
and come to us. To examine the model, we followed the propagation trajectories
of UHE protons in a simulated universe with clusters, filaments, and voids, by
employing a number of models for cosmic magnetic fields. In this study, we
present some of the initial results, such as the ratio between the particles
directly escaping from the clusters to the voids and particles escaping from
the clusters to the filaments. We also discuss the feasibility of our model for
the origin of the hotspot by examining the trajectories of the UHE protons.
