In the 2011 Great East Japan Earthquake, many structures were devastated by the associated tsunamis that were much larger than conventional expectations. As the possibility of the Tokai, Tonankai, Nankai Consolidated Type Earthquake is of recent concern, we will need to reinforce tsunami prevention in coastal areas. In this process, it is important to evaluate the behavior of tsunami runup rushing to the land and the tsunami forces on onshore structures. Mitsubishi Heavy Industries (MHI) has researched techniques for studying wave forces on ships for more than 100 years and possesses state‐of‐the‐art comprehensive computer simulation techniques. By combining these techniques, we have developed a method to evaluate tsunami behaviors and forces in a 3‐D analysis and have facilitated real applications. This report will outline the analysis and evaluation techniques with an example of real plant applications.
