This report investigates the impact force of drifting container due to surge front tsunamis. Because the impact force depends on the material and rigidity of the objects, the 1/5 scale model experiments are conducted with container made of steel and concrete wall. First, effect of the material and rigidity, impact force tests in the air are conducted. Then, the velocity of drifting container is checked. Finally, the drifting container impact force tests due to surge front tsunami are conducted. The empirical formula based on Hertz theory is applied to the impact force results. It indicates that this formula can evaluate the impact force under this report condition.
