Our research focuses on the dynamics of hazardous flows in mountain areas and their mitigation countermeasures against sediment-related disasters, such as debris flows, landslides, as well as flooding in urban area. It consists of theoretical and numerical modeling and high efficient MPI/GPU parallel computation. We are also developing an illustration system (Advance Numerical Scenario Illustration Platform，ANSI-platform), which provides user-interactive and animated 3D scenes.