What you've just said above is almost correct, however, it only confirms that what you said earlier was incorrect. The earthquake did not damage the plant.
Continue to split hairs if you must. But before you go any further, do yourself a favor and go back and read my post my quibbling friend. Nowhere did I say the earthquake caused the problem. I simply pointed out that building a nuclear plant in an earthquake zone is asking for trouble. Just ask any 12 year old.
Tsunamis don't just form out of thin air (or calm waters). Some external force (like, say, an earthquake under the ocean floor!) must be present that causes displacement of the water with enough force to inflict damage such as we're seeing in Japan today. And as MHz said, we don't yet know how much damage the initial force of the earthquake had on the plant prior to the tsunami hitting the coast. A 9.0 magnitude quake would jar your teeth and shake you to the bone. I can't imagine the impact it would have on rigid piping, wiring & conduit, motor mountings, communications and a whole host of other systems within the plant.