In this study, the proposal of Floating Large size Tsunami shelter (FLTS) and the analysis of motion of FLTS when the shelter is attacked tsunami flow using the experiment and the numerical simulation by moving particle semi-implicit method (MPS).FLTS is an evacuation facility without seeking refuge to a hill and the tower. Because an evacuation place surface by itself buoyancy.

FLTS will solve some critical problems. For example, improve to seek for refuge of people of requiring assistance during a disaster, protect daily and medical goods and improve quality of life level after the disaster. To realize such services, we evaluated the validity and safety of a floating large size tsunami shelter using the mooring dolphin by water tank experiment and numerical simulation. As a result, enough performance was recognized. However, it became clear about the numerical simulation that improvement was more necessary.