On March 11, 2011, an earthquake occurred off the Pacific coast of Tohoku. The tsunami caused by this earthquake resulted in severe and extensive damage to structures in northeastern Japan. Consequently, the establishment of safer design methods has become a matter of social responsibility. In this study, hydraulic tests were conducted using a hydraulics model. Next, a CFD simulation is also carried out, which is validated by a comparison of the results with the experimental ones. Finally, the characteristics of the tsunami forces acting on the isolated and grouped buildings were investigated based on the experimental and analytical results.
