© 2018 World Scientific Publishing Co. Pte. Ltd. When a tsunami comes to seaside industrial areas, seawater would enter landside areas through underground pipelines and induce inundation disasters. In the present study, the authors aim to investigate the risks of this tsunami inundation via the pipelines using the numerical simulation model. The results indicated that the influence of the tsunami inundation via the pipelines on seaside areas is not small and especially it will likely to influence the initial phase of evacuation. It is therefore important for port authorities and city planners to consider such risks when developing tsunami mitigation plans.