That's true, but these containment tanks are right next to the ocean. So pretty much everything that leaks is going into the ocean.

And they aren't going to be gone by the time the next tsunami hits, so I think it is roughly (and with their level of ineptitude and deceit, roughly is as good as we are gonna get) reasonable to think that it's all (300,000 tons of radioactive water and counting) going into the Pacific at some point...