Numerical experiments on tsunami-induced wave force acting on an inland structure in the presence of nearshore structures are conducted to investigate the effects of the number and arrangement of the nearshore structures. Numerical results show that the water depth coefficient is affected by the presence and arrangement of the nearshore structures, and consequently the evaluation of tsunami force using the interim Japanese national guideline still remains open to question for the presence of nearshore structures. Furthermore, it is revealed that the maximum tsunami force can be evaluated using a formula based on the momentum and drag force.
