Tsunami-induced wave pressure and tsunami force acting on containers on an apron are investigated with a three-dimensional numerical simulation based on MARS (Multi-interface Advection and Reconstruction Solver) as well as hydraulic model experiments for the measurements of runup height on the apron and tsunami force acting on the containers. It is consequently found that the numerical method allows the good estimations of both the runup height on the apron and tsunami force acting on the containers. It is also revealed that the maximum runup height in front of the containers gives the maximum wave pressure on the containers with hydrostatic pressure approximation, however impact pressure on the lower part of the containers may exceed this hydrostatic water pressure.