The March 11, 2011 disaster taught us that we must be prepared for tsunamis and earthquakes of a scale that cannot be predicted by relying on past data alone. Better predictions require that we create scenarios based on many factors including season, time, location, and weather, as well as the scale of the earthquake and tsunami, in a comprehensive manner. Even for just one scenario the K computer requires a considerable amount of time. We expect that the simulations on the post-K computer will be much faster. The integrated simulation system of the post-K computer will be beneficial to the national and local governments in their disaster-relief efforts.

• Sub-issue A: Practical development of simulation-based prediction for earthquake and tsunami disaster and hazard
• Sub-issue B: Development of social science simulation for integrated prediction of earthquake and tsunami disaster and hazard