Abstract
Tsunami has caused heavy damage to the coastal areas in Japan where the activitive countermeasure have been carried out to reduce the possibility of disaster. Tsunami warnings that provide with the arrival time and tsunami heights before the attack was started in 1952 and recently improved incorporating a database using computer simulation, in which the initial of a tsunami is estimated from only just seismic information. Combined numerical simulation together with observation in real time is proposed to improve estimation of the initial tsunami conditions. Simulation used to evaluate the damage caused by tsunami such as casualties, destroyed houses, and so on has been developed with the GIS data and a model of human behavior for evacuation. Study on historical tsunami using the sedimentrological approach is introduced to understand the detailed behavior of recent and historical events on land.
