Numerical analysis of the pressure to which a ship is subjected to in waves is essential for improving propulsive performance and evaluating safety. Traditionally, the mesh-based methods have been mainly used, but the application of the particle method is expected to facilitate the simulation of reflected water waves, wave breaking, and splaying phenomena near the bow of a ship. However, detailed numerical analysis requires high resolution, which increases computation time and memory consumption In this study, a multi-resolution technique for particle methods by Shibata et al. which can locally improve the spatial resolution based on domain decomposition, was applied to the MPS method, and was used to numerically analyze waves incident on a ship. The wave generation and boundary conditions were similar to those used by Shibata et al. For pressure calculations, the method of Shibata et al.'s method with improved free surface determination and Dirichlet boundary conditions was used. The pressure exerted on the hull by the incoming water waves was numerically analyzed using this method, and the results were compared with experimental data. We also compared the results of ordinary spherical particle calculations and those of elliptical particles, and examined the effectiveness of each.