I am concerned to find that there are at least 32 Asian nuclear reactors in operation or under construction that are at risk for tsunami damage. As does the Fukushima Daiichi nuclear power plant, five nuclear plants in China and Taiwan lie near subduction zones (areas at risk for very large earthquakes and tsunamis) and as a Univeristy of Minnesota professor says,"We have to assume they'll be hit."
For the 5 Chinese and Taiwanese nuclear plants the real worry is the Manila Trench. This subduction area is facing a growing risk for a major earthquake as tremendous pressure and stresses are building. The last major earthquake in the Manila Trench happened about 440 years ago.
A 9.0 magnitude earthquake in the Manila Trench could trigger tsunamis 15 to 24 feet high. These monster tsunamis would be expected to hit each of the 5 nuclear power plants in China and Taiwan. Unfortuantely, the Japanese nuclear disaster is likely not going to be the last one ever caused by a tsunami.
As always, the bottom line is that multiple risks for disaster exist in our modern society. Some are man-made, some are natural, and many come from a combination of natural and man-made risk factors. It seems that the "combination" risks are among the greatest. So please prepare for any man-made or natural disaster.