This paper summarizes the special session “Coastal Disaster Prevention -for huge earthquakes and tsunami hazards-.” This session has been planned to understand the tsunami hazards and current status of countermeasures, simulation technique, measuring system and international network system. In the session, details of each topic have been presented. After presentations, discussions on the countermeasures against tsunami hazards have been done. In the discussions, safety of residents was one of the main topics. Also importance of education for disaster prevention and provision of adequate information have been pointed out.